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SubjectRe: Linux 4.18.6
diff --git a/Makefile b/Makefile
index a41692c5827a..62524f4d42ad 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
VERSION = 4
PATCHLEVEL = 18
-SUBLEVEL = 5
+SUBLEVEL = 6
EXTRAVERSION =
NAME = Merciless Moray

@@ -493,9 +493,13 @@ KBUILD_AFLAGS += $(call cc-option, -no-integrated-as)
endif

RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
+RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
+RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
+RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
export RETPOLINE_CFLAGS
+export RETPOLINE_VDSO_CFLAGS

KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
KBUILD_AFLAGS += $(call cc-option,-fno-PIE)
diff --git a/arch/Kconfig b/arch/Kconfig
index d1f2ed462ac8..f03b72644902 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -354,6 +354,9 @@ config HAVE_ARCH_JUMP_LABEL
config HAVE_RCU_TABLE_FREE
bool

+config HAVE_RCU_TABLE_INVALIDATE
+ bool
+
config ARCH_HAVE_NMI_SAFE_CMPXCHG
bool

diff --git a/arch/arm/net/bpf_jit_32.c b/arch/arm/net/bpf_jit_32.c
index f6a62ae44a65..c864f6b045ba 100644
--- a/arch/arm/net/bpf_jit_32.c
+++ b/arch/arm/net/bpf_jit_32.c
@@ -238,7 +238,7 @@ static void jit_fill_hole(void *area, unsigned int size)
#define STACK_SIZE ALIGN(_STACK_SIZE, STACK_ALIGNMENT)

/* Get the offset of eBPF REGISTERs stored on scratch space. */
-#define STACK_VAR(off) (STACK_SIZE - off)
+#define STACK_VAR(off) (STACK_SIZE - off - 4)

#if __LINUX_ARM_ARCH__ < 7

diff --git a/arch/arm/probes/kprobes/core.c b/arch/arm/probes/kprobes/core.c
index e90cc8a08186..a8be6fe3946d 100644
--- a/arch/arm/probes/kprobes/core.c
+++ b/arch/arm/probes/kprobes/core.c
@@ -289,8 +289,8 @@ void __kprobes kprobe_handler(struct pt_regs *regs)
break;
case KPROBE_REENTER:
/* A nested probe was hit in FIQ, it is a BUG */
- pr_warn("Unrecoverable kprobe detected at %p.\n",
- p->addr);
+ pr_warn("Unrecoverable kprobe detected.\n");
+ dump_kprobe(p);
/* fall through */
default:
/* impossible cases */
diff --git a/arch/arm/probes/kprobes/test-core.c b/arch/arm/probes/kprobes/test-core.c
index 14db14152909..cc237fa9b90f 100644
--- a/arch/arm/probes/kprobes/test-core.c
+++ b/arch/arm/probes/kprobes/test-core.c
@@ -1461,7 +1461,6 @@ static bool check_test_results(void)
print_registers(&result_regs);

if (mem) {
- pr_err("current_stack=%p\n", current_stack);
pr_err("expected_memory:\n");
print_memory(expected_memory, mem_size);
pr_err("result_memory:\n");
diff --git a/arch/arm64/boot/dts/rockchip/rk3328.dtsi b/arch/arm64/boot/dts/rockchip/rk3328.dtsi
index b8e9da15e00c..2c1aa84abeea 100644
--- a/arch/arm64/boot/dts/rockchip/rk3328.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3328.dtsi
@@ -331,7 +331,7 @@
reg = <0x0 0xff120000 0x0 0x100>;
interrupts = <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&cru SCLK_UART1>, <&cru PCLK_UART1>;
- clock-names = "sclk_uart", "pclk_uart";
+ clock-names = "baudclk", "apb_pclk";
dmas = <&dmac 4>, <&dmac 5>;
dma-names = "tx", "rx";
pinctrl-names = "default";
diff --git a/arch/arm64/include/asm/cache.h b/arch/arm64/include/asm/cache.h
index 5df5cfe1c143..5ee5bca8c24b 100644
--- a/arch/arm64/include/asm/cache.h
+++ b/arch/arm64/include/asm/cache.h
@@ -21,12 +21,16 @@
#define CTR_L1IP_SHIFT 14
#define CTR_L1IP_MASK 3
#define CTR_DMINLINE_SHIFT 16
+#define CTR_IMINLINE_SHIFT 0
#define CTR_ERG_SHIFT 20
#define CTR_CWG_SHIFT 24
#define CTR_CWG_MASK 15
#define CTR_IDC_SHIFT 28
#define CTR_DIC_SHIFT 29

+#define CTR_CACHE_MINLINE_MASK \
+ (0xf << CTR_DMINLINE_SHIFT | 0xf << CTR_IMINLINE_SHIFT)
+
#define CTR_L1IP(ctr) (((ctr) >> CTR_L1IP_SHIFT) & CTR_L1IP_MASK)

#define ICACHE_POLICY_VPIPT 0
diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h
index 8a699c708fc9..be3bf3d08916 100644
--- a/arch/arm64/include/asm/cpucaps.h
+++ b/arch/arm64/include/asm/cpucaps.h
@@ -49,7 +49,8 @@
#define ARM64_HAS_CACHE_DIC 28
#define ARM64_HW_DBM 29
#define ARM64_SSBD 30
+#define ARM64_MISMATCHED_CACHE_TYPE 31

-#define ARM64_NCAPS 31
+#define ARM64_NCAPS 32

#endif /* __ASM_CPUCAPS_H */
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index 1d2b6d768efe..5d59ff9a8da9 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -65,12 +65,18 @@ is_kryo_midr(const struct arm64_cpu_capabilities *entry, int scope)
}

static bool
-has_mismatched_cache_line_size(const struct arm64_cpu_capabilities *entry,
- int scope)
+has_mismatched_cache_type(const struct arm64_cpu_capabilities *entry,
+ int scope)
{
+ u64 mask = CTR_CACHE_MINLINE_MASK;
+
+ /* Skip matching the min line sizes for cache type check */
+ if (entry->capability == ARM64_MISMATCHED_CACHE_TYPE)
+ mask ^= arm64_ftr_reg_ctrel0.strict_mask;
+
WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());
- return (read_cpuid_cachetype() & arm64_ftr_reg_ctrel0.strict_mask) !=
- (arm64_ftr_reg_ctrel0.sys_val & arm64_ftr_reg_ctrel0.strict_mask);
+ return (read_cpuid_cachetype() & mask) !=
+ (arm64_ftr_reg_ctrel0.sys_val & mask);
}

static void
@@ -613,7 +619,14 @@ const struct arm64_cpu_capabilities arm64_errata[] = {
{
.desc = "Mismatched cache line size",
.capability = ARM64_MISMATCHED_CACHE_LINE_SIZE,
- .matches = has_mismatched_cache_line_size,
+ .matches = has_mismatched_cache_type,
+ .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
+ .cpu_enable = cpu_enable_trap_ctr_access,
+ },
+ {
+ .desc = "Mismatched cache type",
+ .capability = ARM64_MISMATCHED_CACHE_TYPE,
+ .matches = has_mismatched_cache_type,
.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
.cpu_enable = cpu_enable_trap_ctr_access,
},
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index c6d80743f4ed..e4103b718a7c 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -214,7 +214,7 @@ static const struct arm64_ftr_bits ftr_ctr[] = {
* If we have differing I-cache policies, report it as the weakest - VIPT.
*/
ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_EXACT, 14, 2, ICACHE_POLICY_VIPT), /* L1Ip */
- ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, 0, 4, 0), /* IminLine */
+ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, CTR_IMINLINE_SHIFT, 4, 0),
ARM64_FTR_END,
};

diff --git a/arch/arm64/kernel/probes/kprobes.c b/arch/arm64/kernel/probes/kprobes.c
index d849d9804011..22a5921562c7 100644
--- a/arch/arm64/kernel/probes/kprobes.c
+++ b/arch/arm64/kernel/probes/kprobes.c
@@ -275,7 +275,7 @@ static int __kprobes reenter_kprobe(struct kprobe *p,
break;
case KPROBE_HIT_SS:
case KPROBE_REENTER:
- pr_warn("Unrecoverable kprobe detected at %p.\n", p->addr);
+ pr_warn("Unrecoverable kprobe detected.\n");
dump_kprobe(p);
BUG();
break;
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 9abf8a1e7b25..787e27964ab9 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -287,7 +287,11 @@ static void __init zone_sizes_init(unsigned long min, unsigned long max)
#ifdef CONFIG_HAVE_ARCH_PFN_VALID
int pfn_valid(unsigned long pfn)
{
- return memblock_is_map_memory(pfn << PAGE_SHIFT);
+ phys_addr_t addr = pfn << PAGE_SHIFT;
+
+ if ((addr >> PAGE_SHIFT) != pfn)
+ return 0;
+ return memblock_is_map_memory(addr);
}
EXPORT_SYMBOL(pfn_valid);
#endif
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index e2122cca4ae2..1e98d22ec119 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -155,15 +155,11 @@ cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap
cflags-$(CONFIG_CPU_VR41XX) += -march=r4100 -Wa,--trap
cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap
cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
-cflags-$(CONFIG_CPU_MIPS32_R1) += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
- -Wa,-mips32 -Wa,--trap
-cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
- -Wa,-mips32r2 -Wa,--trap
+cflags-$(CONFIG_CPU_MIPS32_R1) += -march=mips32 -Wa,--trap
+cflags-$(CONFIG_CPU_MIPS32_R2) += -march=mips32r2 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap -modd-spreg
-cflags-$(CONFIG_CPU_MIPS64_R1) += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
- -Wa,-mips64 -Wa,--trap
-cflags-$(CONFIG_CPU_MIPS64_R2) += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
- -Wa,-mips64r2 -Wa,--trap
+cflags-$(CONFIG_CPU_MIPS64_R1) += -march=mips64 -Wa,--trap
+cflags-$(CONFIG_CPU_MIPS64_R2) += -march=mips64r2 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap
cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap
cflags-$(CONFIG_CPU_R5432) += $(call cc-option,-march=r5400,-march=r5000) \
diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h
index af34afbc32d9..b2fa62922d88 100644
--- a/arch/mips/include/asm/processor.h
+++ b/arch/mips/include/asm/processor.h
@@ -141,7 +141,7 @@ struct mips_fpu_struct {

#define NUM_DSP_REGS 6

-typedef __u32 dspreg_t;
+typedef unsigned long dspreg_t;

struct mips_dsp_state {
dspreg_t dspr[NUM_DSP_REGS];
@@ -386,7 +386,20 @@ unsigned long get_wchan(struct task_struct *p);
#define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[29])
#define KSTK_STATUS(tsk) (task_pt_regs(tsk)->cp0_status)

+#ifdef CONFIG_CPU_LOONGSON3
+/*
+ * Loongson-3's SFB (Store-Fill-Buffer) may buffer writes indefinitely when a
+ * tight read loop is executed, because reads take priority over writes & the
+ * hardware (incorrectly) doesn't ensure that writes will eventually occur.
+ *
+ * Since spin loops of any kind should have a cpu_relax() in them, force an SFB
+ * flush from cpu_relax() such that any pending writes will become visible as
+ * expected.
+ */
+#define cpu_relax() smp_mb()
+#else
#define cpu_relax() barrier()
+#endif

/*
* Return_address is a replacement for __builtin_return_address(count)
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 9f6c3f2aa2e2..8c8d42823bda 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -856,7 +856,7 @@ long arch_ptrace(struct task_struct *child, long request,
goto out;
}
dregs = __get_dsp_regs(child);
- tmp = (unsigned long) (dregs[addr - DSP_BASE]);
+ tmp = dregs[addr - DSP_BASE];
break;
}
case DSP_CONTROL:
diff --git a/arch/mips/kernel/ptrace32.c b/arch/mips/kernel/ptrace32.c
index 7edc629304c8..bc348d44d151 100644
--- a/arch/mips/kernel/ptrace32.c
+++ b/arch/mips/kernel/ptrace32.c
@@ -142,7 +142,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
goto out;
}
dregs = __get_dsp_regs(child);
- tmp = (unsigned long) (dregs[addr - DSP_BASE]);
+ tmp = dregs[addr - DSP_BASE];
break;
}
case DSP_CONTROL:
diff --git a/arch/mips/lib/memset.S b/arch/mips/lib/memset.S
index 1cc306520a55..fac26ce64b2f 100644
--- a/arch/mips/lib/memset.S
+++ b/arch/mips/lib/memset.S
@@ -195,6 +195,7 @@
#endif
#else
PTR_SUBU t0, $0, a2
+ move a2, zero /* No remaining longs */
PTR_ADDIU t0, 1
STORE_BYTE(0)
STORE_BYTE(1)
@@ -231,7 +232,7 @@

#ifdef CONFIG_CPU_MIPSR6
.Lbyte_fixup\@:
- PTR_SUBU a2, $0, t0
+ PTR_SUBU a2, t0
jr ra
PTR_ADDIU a2, 1
#endif /* CONFIG_CPU_MIPSR6 */
diff --git a/arch/mips/lib/multi3.c b/arch/mips/lib/multi3.c
index 111ad475aa0c..4c2483f410c2 100644
--- a/arch/mips/lib/multi3.c
+++ b/arch/mips/lib/multi3.c
@@ -4,12 +4,12 @@
#include "libgcc.h"

/*
- * GCC 7 suboptimally generates __multi3 calls for mips64r6, so for that
- * specific case only we'll implement it here.
+ * GCC 7 & older can suboptimally generate __multi3 calls for mips64r6, so for
+ * that specific case only we implement that intrinsic here.
*
* See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82981
*/
-#if defined(CONFIG_64BIT) && defined(CONFIG_CPU_MIPSR6) && (__GNUC__ == 7)
+#if defined(CONFIG_64BIT) && defined(CONFIG_CPU_MIPSR6) && (__GNUC__ < 8)

/* multiply 64-bit values, low 64-bits returned */
static inline long long notrace dmulu(long long a, long long b)
diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h
index de11ecc99c7c..9c9970a5dfb1 100644
--- a/arch/s390/include/asm/qdio.h
+++ b/arch/s390/include/asm/qdio.h
@@ -262,7 +262,6 @@ struct qdio_outbuf_state {
void *user;
};

-#define QDIO_OUTBUF_STATE_FLAG_NONE 0x00
#define QDIO_OUTBUF_STATE_FLAG_PENDING 0x01

#define CHSC_AC1_INITIATE_INPUTQ 0x80
diff --git a/arch/s390/lib/mem.S b/arch/s390/lib/mem.S
index 2311f15be9cf..40c4d59c926e 100644
--- a/arch/s390/lib/mem.S
+++ b/arch/s390/lib/mem.S
@@ -17,7 +17,7 @@
ENTRY(memmove)
ltgr %r4,%r4
lgr %r1,%r2
- bzr %r14
+ jz .Lmemmove_exit
aghi %r4,-1
clgr %r2,%r3
jnh .Lmemmove_forward
@@ -36,6 +36,7 @@ ENTRY(memmove)
.Lmemmove_forward_remainder:
larl %r5,.Lmemmove_mvc
ex %r4,0(%r5)
+.Lmemmove_exit:
BR_EX %r14
.Lmemmove_reverse:
ic %r0,0(%r4,%r3)
@@ -65,7 +66,7 @@ EXPORT_SYMBOL(memmove)
*/
ENTRY(memset)
ltgr %r4,%r4
- bzr %r14
+ jz .Lmemset_exit
ltgr %r3,%r3
jnz .Lmemset_fill
aghi %r4,-1
@@ -80,6 +81,7 @@ ENTRY(memset)
.Lmemset_clear_remainder:
larl %r3,.Lmemset_xc
ex %r4,0(%r3)
+.Lmemset_exit:
BR_EX %r14
.Lmemset_fill:
cghi %r4,1
@@ -115,7 +117,7 @@ EXPORT_SYMBOL(memset)
*/
ENTRY(memcpy)
ltgr %r4,%r4
- bzr %r14
+ jz .Lmemcpy_exit
aghi %r4,-1
srlg %r5,%r4,8
ltgr %r5,%r5
@@ -124,6 +126,7 @@ ENTRY(memcpy)
.Lmemcpy_remainder:
larl %r5,.Lmemcpy_mvc
ex %r4,0(%r5)
+.Lmemcpy_exit:
BR_EX %r14
.Lmemcpy_loop:
mvc 0(256,%r1),0(%r3)
@@ -145,9 +148,9 @@ EXPORT_SYMBOL(memcpy)
.macro __MEMSET bits,bytes,insn
ENTRY(__memset\bits)
ltgr %r4,%r4
- bzr %r14
+ jz .L__memset_exit\bits
cghi %r4,\bytes
- je .L__memset_exit\bits
+ je .L__memset_store\bits
aghi %r4,-(\bytes+1)
srlg %r5,%r4,8
ltgr %r5,%r5
@@ -163,8 +166,9 @@ ENTRY(__memset\bits)
larl %r5,.L__memset_mvc\bits
ex %r4,0(%r5)
BR_EX %r14
-.L__memset_exit\bits:
+.L__memset_store\bits:
\insn %r3,0(%r2)
+.L__memset_exit\bits:
BR_EX %r14
.L__memset_mvc\bits:
mvc \bytes(1,%r1),0(%r1)
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index e074480d3598..4cc3f06b0ab3 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -502,6 +502,8 @@ static inline int do_exception(struct pt_regs *regs, int access)
/* No reason to continue if interrupted by SIGKILL. */
if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current)) {
fault = VM_FAULT_SIGNAL;
+ if (flags & FAULT_FLAG_RETRY_NOWAIT)
+ goto out_up;
goto out;
}
if (unlikely(fault & VM_FAULT_ERROR))
diff --git a/arch/s390/mm/page-states.c b/arch/s390/mm/page-states.c
index 382153ff17e3..dc3cede7f2ec 100644
--- a/arch/s390/mm/page-states.c
+++ b/arch/s390/mm/page-states.c
@@ -271,7 +271,7 @@ void arch_set_page_states(int make_stable)
list_for_each(l, &zone->free_area[order].free_list[t]) {
page = list_entry(l, struct page, lru);
if (make_stable)
- set_page_stable_dat(page, 0);
+ set_page_stable_dat(page, order);
else
set_page_unused(page, order);
}
diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c
index 5f0234ec8038..d7052cbe984f 100644
--- a/arch/s390/net/bpf_jit_comp.c
+++ b/arch/s390/net/bpf_jit_comp.c
@@ -485,8 +485,6 @@ static void bpf_jit_epilogue(struct bpf_jit *jit, u32 stack_depth)
/* br %r1 */
_EMIT2(0x07f1);
} else {
- /* larl %r1,.+14 */
- EMIT6_PCREL_RILB(0xc0000000, REG_1, jit->prg + 14);
/* ex 0,S390_lowcore.br_r1_tampoline */
EMIT4_DISP(0x44000000, REG_0, REG_0,
offsetof(struct lowcore, br_r1_trampoline));
diff --git a/arch/s390/numa/numa.c b/arch/s390/numa/numa.c
index 06a80434cfe6..5bd374491f94 100644
--- a/arch/s390/numa/numa.c
+++ b/arch/s390/numa/numa.c
@@ -134,26 +134,14 @@ void __init numa_setup(void)
{
pr_info("NUMA mode: %s\n", mode->name);
nodes_clear(node_possible_map);
+ /* Initially attach all possible CPUs to node 0. */
+ cpumask_copy(&node_to_cpumask_map[0], cpu_possible_mask);
if (mode->setup)
mode->setup();
numa_setup_memory();
memblock_dump_all();
}

-/*
- * numa_init_early() - Initialization initcall
- *
- * This runs when only one CPU is online and before the first
- * topology update is called for by the scheduler.
- */
-static int __init numa_init_early(void)
-{
- /* Attach all possible CPUs to node 0 for now. */
- cpumask_copy(&node_to_cpumask_map[0], cpu_possible_mask);
- return 0;
-}
-early_initcall(numa_init_early);
-
/*
* numa_init_late() - Initialization initcall
*
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 4902fed221c0..8a505cfdd9b9 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -421,6 +421,8 @@ int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
hwirq = 0;
for_each_pci_msi_entry(msi, pdev) {
rc = -EIO;
+ if (hwirq >= msi_vecs)
+ break;
irq = irq_alloc_desc(0); /* Alloc irq on node 0 */
if (irq < 0)
return -ENOMEM;
diff --git a/arch/s390/purgatory/Makefile b/arch/s390/purgatory/Makefile
index 1ace023cbdce..abfa8c7a6d9a 100644
--- a/arch/s390/purgatory/Makefile
+++ b/arch/s390/purgatory/Makefile
@@ -7,13 +7,13 @@ purgatory-y := head.o purgatory.o string.o sha256.o mem.o
targets += $(purgatory-y) purgatory.ro kexec-purgatory.c
PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y))

-$(obj)/sha256.o: $(srctree)/lib/sha256.c
+$(obj)/sha256.o: $(srctree)/lib/sha256.c FORCE
$(call if_changed_rule,cc_o_c)

-$(obj)/mem.o: $(srctree)/arch/s390/lib/mem.S
+$(obj)/mem.o: $(srctree)/arch/s390/lib/mem.S FORCE
$(call if_changed_rule,as_o_S)

-$(obj)/string.o: $(srctree)/arch/s390/lib/string.c
+$(obj)/string.o: $(srctree)/arch/s390/lib/string.c FORCE
$(call if_changed_rule,cc_o_c)

LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined -nostdlib
@@ -23,6 +23,7 @@ KBUILD_CFLAGS += -Wno-pointer-sign -Wno-sign-compare
KBUILD_CFLAGS += -fno-zero-initialized-in-bss -fno-builtin -ffreestanding
KBUILD_CFLAGS += -c -MD -Os -m64 -msoft-float
KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
+KBUILD_AFLAGS := $(filter-out -DCC_USING_EXPOLINE,$(KBUILD_AFLAGS))

$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
$(call if_changed,ld)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 6b8065d718bd..1aa4dd3b5687 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -179,6 +179,7 @@ config X86
select HAVE_PERF_REGS
select HAVE_PERF_USER_STACK_DUMP
select HAVE_RCU_TABLE_FREE
+ select HAVE_RCU_TABLE_INVALIDATE if HAVE_RCU_TABLE_FREE
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_RELIABLE_STACKTRACE if X86_64 && UNWINDER_FRAME_POINTER && STACK_VALIDATION
select HAVE_STACKPROTECTOR if CC_HAS_SANE_STACKPROTECTOR
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index a08e82856563..d944b52649a4 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -180,10 +180,6 @@ ifdef CONFIG_FUNCTION_GRAPH_TRACER
endif
endif

-ifndef CC_HAVE_ASM_GOTO
- $(error Compiler lacks asm-goto support.)
-endif
-
#
# Jump labels need '-maccumulate-outgoing-args' for gcc < 4.5.2 to prevent a
# GCC bug (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46226). There's no way
@@ -317,6 +313,13 @@ PHONY += vdso_install
vdso_install:
$(Q)$(MAKE) $(build)=arch/x86/entry/vdso $@

+archprepare: checkbin
+checkbin:
+ifndef CC_HAVE_ASM_GOTO
+ @echo Compiler lacks asm-goto support.
+ @exit 1
+endif
+
archclean:
$(Q)rm -rf $(objtree)/arch/i386
$(Q)rm -rf $(objtree)/arch/x86_64
diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile
index 261802b1cc50..9589878faf46 100644
--- a/arch/x86/entry/vdso/Makefile
+++ b/arch/x86/entry/vdso/Makefile
@@ -72,9 +72,9 @@ $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE
CFL := $(PROFILING) -mcmodel=small -fPIC -O2 -fasynchronous-unwind-tables -m64 \
$(filter -g%,$(KBUILD_CFLAGS)) $(call cc-option, -fno-stack-protector) \
-fno-omit-frame-pointer -foptimize-sibling-calls \
- -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO
+ -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO $(RETPOLINE_VDSO_CFLAGS)

-$(vobjs): KBUILD_CFLAGS := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS)) $(CFL)
+$(vobjs): KBUILD_CFLAGS := $(filter-out $(GCC_PLUGINS_CFLAGS) $(RETPOLINE_CFLAGS),$(KBUILD_CFLAGS)) $(CFL)

#
# vDSO code runs in userspace and -pg doesn't help with profiling anyway.
@@ -138,11 +138,13 @@ KBUILD_CFLAGS_32 := $(filter-out -mcmodel=kernel,$(KBUILD_CFLAGS_32))
KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32))
KBUILD_CFLAGS_32 := $(filter-out -mfentry,$(KBUILD_CFLAGS_32))
KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32))
+KBUILD_CFLAGS_32 := $(filter-out $(RETPOLINE_CFLAGS),$(KBUILD_CFLAGS_32))
KBUILD_CFLAGS_32 += -m32 -msoft-float -mregparm=0 -fpic
KBUILD_CFLAGS_32 += $(call cc-option, -fno-stack-protector)
KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls)
KBUILD_CFLAGS_32 += -fno-omit-frame-pointer
KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING
+KBUILD_CFLAGS_32 += $(RETPOLINE_VDSO_CFLAGS)
$(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD_CFLAGS_32)

$(obj)/vdso32.so.dbg: FORCE \
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 5f4829f10129..dfb2f7c0d019 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -2465,7 +2465,7 @@ perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs

perf_callchain_store(entry, regs->ip);

- if (!current->mm)
+ if (!nmi_uaccess_okay())
return;

if (perf_callchain_user32(regs, entry))
diff --git a/arch/x86/include/asm/irqflags.h b/arch/x86/include/asm/irqflags.h
index c14f2a74b2be..15450a675031 100644
--- a/arch/x86/include/asm/irqflags.h
+++ b/arch/x86/include/asm/irqflags.h
@@ -33,7 +33,8 @@ extern inline unsigned long native_save_fl(void)
return flags;
}

-static inline void native_restore_fl(unsigned long flags)
+extern inline void native_restore_fl(unsigned long flags);
+extern inline void native_restore_fl(unsigned long flags)
{
asm volatile("push %0 ; popf"
: /* no output */
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 682286aca881..d53c54b842da 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -132,6 +132,8 @@ struct cpuinfo_x86 {
/* Index into per_cpu list: */
u16 cpu_index;
u32 microcode;
+ /* Address space bits used by the cache internally */
+ u8 x86_cache_bits;
unsigned initialized : 1;
} __randomize_layout;

@@ -181,9 +183,9 @@ extern const struct seq_operations cpuinfo_op;

extern void cpu_detect(struct cpuinfo_x86 *c);

-static inline unsigned long l1tf_pfn_limit(void)
+static inline unsigned long long l1tf_pfn_limit(void)
{
- return BIT(boot_cpu_data.x86_phys_bits - 1 - PAGE_SHIFT) - 1;
+ return BIT_ULL(boot_cpu_data.x86_cache_bits - 1 - PAGE_SHIFT);
}

extern void early_cpu_init(void);
diff --git a/arch/x86/include/asm/stacktrace.h b/arch/x86/include/asm/stacktrace.h
index b6dc698f992a..f335aad404a4 100644
--- a/arch/x86/include/asm/stacktrace.h
+++ b/arch/x86/include/asm/stacktrace.h
@@ -111,6 +111,6 @@ static inline unsigned long caller_frame_pointer(void)
return (unsigned long)frame;
}

-void show_opcodes(u8 *rip, const char *loglvl);
+void show_opcodes(struct pt_regs *regs, const char *loglvl);
void show_ip(struct pt_regs *regs, const char *loglvl);
#endif /* _ASM_X86_STACKTRACE_H */
diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h
index 6690cd3fc8b1..0af97e51e609 100644
--- a/arch/x86/include/asm/tlbflush.h
+++ b/arch/x86/include/asm/tlbflush.h
@@ -175,8 +175,16 @@ struct tlb_state {
* are on. This means that it may not match current->active_mm,
* which will contain the previous user mm when we're in lazy TLB
* mode even if we've already switched back to swapper_pg_dir.
+ *
+ * During switch_mm_irqs_off(), loaded_mm will be set to
+ * LOADED_MM_SWITCHING during the brief interrupts-off window
+ * when CR3 and loaded_mm would otherwise be inconsistent. This
+ * is for nmi_uaccess_okay()'s benefit.
*/
struct mm_struct *loaded_mm;
+
+#define LOADED_MM_SWITCHING ((struct mm_struct *)1)
+
u16 loaded_mm_asid;
u16 next_asid;
/* last user mm's ctx id */
@@ -246,6 +254,38 @@ struct tlb_state {
};
DECLARE_PER_CPU_SHARED_ALIGNED(struct tlb_state, cpu_tlbstate);

+/*
+ * Blindly accessing user memory from NMI context can be dangerous
+ * if we're in the middle of switching the current user task or
+ * switching the loaded mm. It can also be dangerous if we
+ * interrupted some kernel code that was temporarily using a
+ * different mm.
+ */
+static inline bool nmi_uaccess_okay(void)
+{
+ struct mm_struct *loaded_mm = this_cpu_read(cpu_tlbstate.loaded_mm);
+ struct mm_struct *current_mm = current->mm;
+
+ VM_WARN_ON_ONCE(!loaded_mm);
+
+ /*
+ * The condition we want to check is
+ * current_mm->pgd == __va(read_cr3_pa()). This may be slow, though,
+ * if we're running in a VM with shadow paging, and nmi_uaccess_okay()
+ * is supposed to be reasonably fast.
+ *
+ * Instead, we check the almost equivalent but somewhat conservative
+ * condition below, and we rely on the fact that switch_mm_irqs_off()
+ * sets loaded_mm to LOADED_MM_SWITCHING before writing to CR3.
+ */
+ if (loaded_mm != current_mm)
+ return false;
+
+ VM_WARN_ON_ONCE(current_mm->pgd != __va(read_cr3_pa()));
+
+ return true;
+}
+
/* Initialize cr4 shadow for this CPU. */
static inline void cr4_init_shadow(void)
{
diff --git a/arch/x86/include/asm/vgtod.h b/arch/x86/include/asm/vgtod.h
index fb856c9f0449..53748541c487 100644
--- a/arch/x86/include/asm/vgtod.h
+++ b/arch/x86/include/asm/vgtod.h
@@ -93,7 +93,7 @@ static inline unsigned int __getcpu(void)
*
* If RDPID is available, use it.
*/
- alternative_io ("lsl %[p],%[seg]",
+ alternative_io ("lsl %[seg],%[p]",
".byte 0xf3,0x0f,0xc7,0xf8", /* RDPID %eax/rax */
X86_FEATURE_RDPID,
[p] "=a" (p), [seg] "r" (__PER_CPU_SEG));
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 664f161f96ff..4891a621a752 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -652,6 +652,45 @@ EXPORT_SYMBOL_GPL(l1tf_mitigation);
enum vmx_l1d_flush_state l1tf_vmx_mitigation = VMENTER_L1D_FLUSH_AUTO;
EXPORT_SYMBOL_GPL(l1tf_vmx_mitigation);

+/*
+ * These CPUs all support 44bits physical address space internally in the
+ * cache but CPUID can report a smaller number of physical address bits.
+ *
+ * The L1TF mitigation uses the top most address bit for the inversion of
+ * non present PTEs. When the installed memory reaches into the top most
+ * address bit due to memory holes, which has been observed on machines
+ * which report 36bits physical address bits and have 32G RAM installed,
+ * then the mitigation range check in l1tf_select_mitigation() triggers.
+ * This is a false positive because the mitigation is still possible due to
+ * the fact that the cache uses 44bit internally. Use the cache bits
+ * instead of the reported physical bits and adjust them on the affected
+ * machines to 44bit if the reported bits are less than 44.
+ */
+static void override_cache_bits(struct cpuinfo_x86 *c)
+{
+ if (c->x86 != 6)
+ return;
+
+ switch (c->x86_model) {
+ case INTEL_FAM6_NEHALEM:
+ case INTEL_FAM6_WESTMERE:
+ case INTEL_FAM6_SANDYBRIDGE:
+ case INTEL_FAM6_IVYBRIDGE:
+ case INTEL_FAM6_HASWELL_CORE:
+ case INTEL_FAM6_HASWELL_ULT:
+ case INTEL_FAM6_HASWELL_GT3E:
+ case INTEL_FAM6_BROADWELL_CORE:
+ case INTEL_FAM6_BROADWELL_GT3E:
+ case INTEL_FAM6_SKYLAKE_MOBILE:
+ case INTEL_FAM6_SKYLAKE_DESKTOP:
+ case INTEL_FAM6_KABYLAKE_MOBILE:
+ case INTEL_FAM6_KABYLAKE_DESKTOP:
+ if (c->x86_cache_bits < 44)
+ c->x86_cache_bits = 44;
+ break;
+ }
+}
+
static void __init l1tf_select_mitigation(void)
{
u64 half_pa;
@@ -659,6 +698,8 @@ static void __init l1tf_select_mitigation(void)
if (!boot_cpu_has_bug(X86_BUG_L1TF))
return;

+ override_cache_bits(&boot_cpu_data);
+
switch (l1tf_mitigation) {
case L1TF_MITIGATION_OFF:
case L1TF_MITIGATION_FLUSH_NOWARN:
@@ -678,14 +719,13 @@ static void __init l1tf_select_mitigation(void)
return;
#endif

- /*
- * This is extremely unlikely to happen because almost all
- * systems have far more MAX_PA/2 than RAM can be fit into
- * DIMM slots.
- */
half_pa = (u64)l1tf_pfn_limit() << PAGE_SHIFT;
if (e820__mapped_any(half_pa, ULLONG_MAX - half_pa, E820_TYPE_RAM)) {
pr_warn("System has more than MAX_PA/2 memory. L1TF mitigation not effective.\n");
+ pr_info("You may make it effective by booting the kernel with mem=%llu parameter.\n",
+ half_pa);
+ pr_info("However, doing so will make a part of your RAM unusable.\n");
+ pr_info("Reading https://www.kernel.org/doc/html/latest/admin-guide/l1tf.html might help you decide.\n");
return;
}

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index b41b72bd8bb8..1ee8ea36af30 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -919,6 +919,7 @@ void get_cpu_address_sizes(struct cpuinfo_x86 *c)
else if (cpu_has(c, X86_FEATURE_PAE) || cpu_has(c, X86_FEATURE_PSE36))
c->x86_phys_bits = 36;
#endif
+ c->x86_cache_bits = c->x86_phys_bits;
}

static void identify_cpu_without_cpuid(struct cpuinfo_x86 *c)
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 6602941cfebf..3f0abb62161b 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -150,6 +150,9 @@ static bool bad_spectre_microcode(struct cpuinfo_x86 *c)
if (cpu_has(c, X86_FEATURE_HYPERVISOR))
return false;

+ if (c->x86 != 6)
+ return false;
+
for (i = 0; i < ARRAY_SIZE(spectre_bad_microcodes); i++) {
if (c->x86_model == spectre_bad_microcodes[i].model &&
c->x86_stepping == spectre_bad_microcodes[i].stepping)
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 666a284116ac..17b02adc79aa 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -17,6 +17,7 @@
#include <linux/bug.h>
#include <linux/nmi.h>
#include <linux/sysfs.h>
+#include <linux/kasan.h>

#include <asm/cpu_entry_area.h>
#include <asm/stacktrace.h>
@@ -91,23 +92,32 @@ static void printk_stack_address(unsigned long address, int reliable,
* Thus, the 2/3rds prologue and 64 byte OPCODE_BUFSIZE is just a random
* guesstimate in attempt to achieve all of the above.
*/
-void show_opcodes(u8 *rip, const char *loglvl)
+void show_opcodes(struct pt_regs *regs, const char *loglvl)
{
unsigned int code_prologue = OPCODE_BUFSIZE * 2 / 3;
u8 opcodes[OPCODE_BUFSIZE];
- u8 *ip;
+ unsigned long ip;
int i;
+ bool bad_ip;

printk("%sCode: ", loglvl);

- ip = (u8 *)rip - code_prologue;
- if (probe_kernel_read(opcodes, ip, OPCODE_BUFSIZE)) {
+ ip = regs->ip - code_prologue;
+
+ /*
+ * Make sure userspace isn't trying to trick us into dumping kernel
+ * memory by pointing the userspace instruction pointer at it.
+ */
+ bad_ip = user_mode(regs) &&
+ __chk_range_not_ok(ip, OPCODE_BUFSIZE, TASK_SIZE_MAX);
+
+ if (bad_ip || probe_kernel_read(opcodes, (u8 *)ip, OPCODE_BUFSIZE)) {
pr_cont("Bad RIP value.\n");
return;
}

for (i = 0; i < OPCODE_BUFSIZE; i++, ip++) {
- if (ip == rip)
+ if (ip == regs->ip)
pr_cont("<%02x> ", opcodes[i]);
else
pr_cont("%02x ", opcodes[i]);
@@ -122,7 +132,7 @@ void show_ip(struct pt_regs *regs, const char *loglvl)
#else
printk("%sRIP: %04x:%pS\n", loglvl, (int)regs->cs, (void *)regs->ip);
#endif
- show_opcodes((u8 *)regs->ip, loglvl);
+ show_opcodes(regs, loglvl);
}

void show_iret_regs(struct pt_regs *regs)
@@ -356,7 +366,10 @@ void oops_end(unsigned long flags, struct pt_regs *regs, int signr)
* We're not going to return, but we might be on an IST stack or
* have very little stack space left. Rewind the stack and kill
* the task.
+ * Before we rewind the stack, we have to tell KASAN that we're going to
+ * reuse the task stack and that existing poisons are invalid.
*/
+ kasan_unpoison_task_stack(current);
rewind_stack_do_exit(signr);
}
NOKPROBE_SYMBOL(oops_end);
diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index da5d8ac60062..50d5848bf22e 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -338,6 +338,18 @@ static resource_size_t __init gen3_stolen_base(int num, int slot, int func,
return bsm & INTEL_BSM_MASK;
}

+static resource_size_t __init gen11_stolen_base(int num, int slot, int func,
+ resource_size_t stolen_size)
+{
+ u64 bsm;
+
+ bsm = read_pci_config(num, slot, func, INTEL_GEN11_BSM_DW0);
+ bsm &= INTEL_BSM_MASK;
+ bsm |= (u64)read_pci_config(num, slot, func, INTEL_GEN11_BSM_DW1) << 32;
+
+ return bsm;
+}
+
static resource_size_t __init i830_stolen_size(int num, int slot, int func)
{
u16 gmch_ctrl;
@@ -498,6 +510,11 @@ static const struct intel_early_ops chv_early_ops __initconst = {
.stolen_size = chv_stolen_size,
};

+static const struct intel_early_ops gen11_early_ops __initconst = {
+ .stolen_base = gen11_stolen_base,
+ .stolen_size = gen9_stolen_size,
+};
+
static const struct pci_device_id intel_early_ids[] __initconst = {
INTEL_I830_IDS(&i830_early_ops),
INTEL_I845G_IDS(&i845_early_ops),
@@ -529,6 +546,7 @@ static const struct pci_device_id intel_early_ids[] __initconst = {
INTEL_CFL_IDS(&gen9_early_ops),
INTEL_GLK_IDS(&gen9_early_ops),
INTEL_CNL_IDS(&gen9_early_ops),
+ INTEL_ICL_11_IDS(&gen11_early_ops),
};

struct resource intel_graphics_stolen_res __ro_after_init = DEFINE_RES_MEM(0, 0);
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 12bb445fb98d..4344a032ebe6 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -384,6 +384,7 @@ start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp)
start_thread_common(regs, new_ip, new_sp,
__USER_CS, __USER_DS, 0);
}
+EXPORT_SYMBOL_GPL(start_thread);

#ifdef CONFIG_COMPAT
void compat_start_thread(struct pt_regs *regs, u32 new_ip, u32 new_sp)
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index af8caf965baa..01d209ab5481 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -235,7 +235,7 @@ static int synic_set_msr(struct kvm_vcpu_hv_synic *synic,
struct kvm_vcpu *vcpu = synic_to_vcpu(synic);
int ret;

- if (!synic->active)
+ if (!synic->active && !host)
return 1;

trace_kvm_hv_synic_set_msr(vcpu->vcpu_id, msr, data, host);
@@ -295,11 +295,12 @@ static int synic_set_msr(struct kvm_vcpu_hv_synic *synic,
return ret;
}

-static int synic_get_msr(struct kvm_vcpu_hv_synic *synic, u32 msr, u64 *pdata)
+static int synic_get_msr(struct kvm_vcpu_hv_synic *synic, u32 msr, u64 *pdata,
+ bool host)
{
int ret;

- if (!synic->active)
+ if (!synic->active && !host)
return 1;

ret = 0;
@@ -1014,6 +1015,11 @@ static int kvm_hv_set_msr_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data,
case HV_X64_MSR_TSC_EMULATION_STATUS:
hv->hv_tsc_emulation_status = data;
break;
+ case HV_X64_MSR_TIME_REF_COUNT:
+ /* read-only, but still ignore it if host-initiated */
+ if (!host)
+ return 1;
+ break;
default:
vcpu_unimpl(vcpu, "Hyper-V uhandled wrmsr: 0x%x data 0x%llx\n",
msr, data);
@@ -1101,6 +1107,12 @@ static int kvm_hv_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host)
return stimer_set_count(vcpu_to_stimer(vcpu, timer_index),
data, host);
}
+ case HV_X64_MSR_TSC_FREQUENCY:
+ case HV_X64_MSR_APIC_FREQUENCY:
+ /* read-only, but still ignore it if host-initiated */
+ if (!host)
+ return 1;
+ break;
default:
vcpu_unimpl(vcpu, "Hyper-V uhandled wrmsr: 0x%x data 0x%llx\n",
msr, data);
@@ -1156,7 +1168,8 @@ static int kvm_hv_get_msr_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
return 0;
}

-static int kvm_hv_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
+static int kvm_hv_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata,
+ bool host)
{
u64 data = 0;
struct kvm_vcpu_hv *hv = &vcpu->arch.hyperv;
@@ -1183,7 +1196,7 @@ static int kvm_hv_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
case HV_X64_MSR_SIMP:
case HV_X64_MSR_EOM:
case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15:
- return synic_get_msr(vcpu_to_synic(vcpu), msr, pdata);
+ return synic_get_msr(vcpu_to_synic(vcpu), msr, pdata, host);
case HV_X64_MSR_STIMER0_CONFIG:
case HV_X64_MSR_STIMER1_CONFIG:
case HV_X64_MSR_STIMER2_CONFIG:
@@ -1229,7 +1242,7 @@ int kvm_hv_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host)
return kvm_hv_set_msr(vcpu, msr, data, host);
}

-int kvm_hv_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
+int kvm_hv_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host)
{
if (kvm_hv_msr_partition_wide(msr)) {
int r;
@@ -1239,7 +1252,7 @@ int kvm_hv_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
mutex_unlock(&vcpu->kvm->arch.hyperv.hv_lock);
return r;
} else
- return kvm_hv_get_msr(vcpu, msr, pdata);
+ return kvm_hv_get_msr(vcpu, msr, pdata, host);
}

static __always_inline int get_sparse_bank_no(u64 valid_bank_mask, int bank_no)
diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h
index 837465d69c6d..d6aa969e20f1 100644
--- a/arch/x86/kvm/hyperv.h
+++ b/arch/x86/kvm/hyperv.h
@@ -48,7 +48,7 @@ static inline struct kvm_vcpu *synic_to_vcpu(struct kvm_vcpu_hv_synic *synic)
}

int kvm_hv_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host);
-int kvm_hv_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
+int kvm_hv_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host);

bool kvm_hv_hypercall_enabled(struct kvm *kvm);
int kvm_hv_hypercall(struct kvm_vcpu *vcpu);
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index f059a73f0fd0..9799f86388e7 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -5580,8 +5580,6 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)

clgi();

- local_irq_enable();
-
/*
* If this vCPU has touched SPEC_CTRL, restore the guest's value if
* it's non-zero. Since vmentry is serialising on affected CPUs, there
@@ -5590,6 +5588,8 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
*/
x86_spec_ctrl_set_guest(svm->spec_ctrl, svm->virt_spec_ctrl);

+ local_irq_enable();
+
asm volatile (
"push %%" _ASM_BP "; \n\t"
"mov %c[rbx](%[svm]), %%" _ASM_BX " \n\t"
@@ -5712,12 +5712,12 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
if (unlikely(!msr_write_intercepted(vcpu, MSR_IA32_SPEC_CTRL)))
svm->spec_ctrl = native_read_msr(MSR_IA32_SPEC_CTRL);

- x86_spec_ctrl_restore_host(svm->spec_ctrl, svm->virt_spec_ctrl);
-
reload_tss(vcpu);

local_irq_disable();

+ x86_spec_ctrl_restore_host(svm->spec_ctrl, svm->virt_spec_ctrl);
+
vcpu->arch.cr2 = svm->vmcb->save.cr2;
vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index a5caa5e5480c..24c84aa87049 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2185,10 +2185,11 @@ static int set_msr_mce(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
vcpu->arch.mcg_status = data;
break;
case MSR_IA32_MCG_CTL:
- if (!(mcg_cap & MCG_CTL_P))
+ if (!(mcg_cap & MCG_CTL_P) &&
+ (data || !msr_info->host_initiated))
return 1;
if (data != 0 && data != ~(u64)0)
- return -1;
+ return 1;
vcpu->arch.mcg_ctl = data;
break;
default:
@@ -2576,7 +2577,7 @@ int kvm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
}
EXPORT_SYMBOL_GPL(kvm_get_msr);

-static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
+static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host)
{
u64 data;
u64 mcg_cap = vcpu->arch.mcg_cap;
@@ -2591,7 +2592,7 @@ static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
data = vcpu->arch.mcg_cap;
break;
case MSR_IA32_MCG_CTL:
- if (!(mcg_cap & MCG_CTL_P))
+ if (!(mcg_cap & MCG_CTL_P) && !host)
return 1;
data = vcpu->arch.mcg_ctl;
break;
@@ -2724,7 +2725,8 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
case MSR_IA32_MCG_CTL:
case MSR_IA32_MCG_STATUS:
case MSR_IA32_MC0_CTL ... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS) - 1:
- return get_msr_mce(vcpu, msr_info->index, &msr_info->data);
+ return get_msr_mce(vcpu, msr_info->index, &msr_info->data,
+ msr_info->host_initiated);
case MSR_K7_CLK_CTL:
/*
* Provide expected ramp-up count for K7. All other
@@ -2745,7 +2747,8 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
case HV_X64_MSR_TSC_EMULATION_CONTROL:
case HV_X64_MSR_TSC_EMULATION_STATUS:
return kvm_hv_get_msr_common(vcpu,
- msr_info->index, &msr_info->data);
+ msr_info->index, &msr_info->data,
+ msr_info->host_initiated);
break;
case MSR_IA32_BBL_CR_CTL3:
/* This legacy MSR exists but isn't fully documented in current
diff --git a/arch/x86/lib/usercopy.c b/arch/x86/lib/usercopy.c
index c8c6ad0d58b8..3f435d7fca5e 100644
--- a/arch/x86/lib/usercopy.c
+++ b/arch/x86/lib/usercopy.c
@@ -7,6 +7,8 @@
#include <linux/uaccess.h>
#include <linux/export.h>

+#include <asm/tlbflush.h>
+
/*
* We rely on the nested NMI work to allow atomic faults from the NMI path; the
* nested NMI paths are careful to preserve CR2.
@@ -19,6 +21,9 @@ copy_from_user_nmi(void *to, const void __user *from, unsigned long n)
if (__range_not_ok(from, n, TASK_SIZE))
return n;

+ if (!nmi_uaccess_okay())
+ return n;
+
/*
* Even though this function is typically called from NMI/IRQ context
* disable pagefaults so that its behaviour is consistent even when
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 2aafa6ab6103..d1f1612672c7 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -838,7 +838,7 @@ show_signal_msg(struct pt_regs *regs, unsigned long error_code,

printk(KERN_CONT "\n");

- show_opcodes((u8 *)regs->ip, loglvl);
+ show_opcodes(regs, loglvl);
}

static void
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index acfab322fbe0..63a6f9fcaf20 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -923,7 +923,7 @@ unsigned long max_swapfile_size(void)

if (boot_cpu_has_bug(X86_BUG_L1TF)) {
/* Limit the swap file size to MAX_PA/2 for L1TF workaround */
- unsigned long l1tf_limit = l1tf_pfn_limit() + 1;
+ unsigned long long l1tf_limit = l1tf_pfn_limit();
/*
* We encode swap offsets also with 3 bits below those for pfn
* which makes the usable limit higher.
@@ -931,7 +931,7 @@ unsigned long max_swapfile_size(void)
#if CONFIG_PGTABLE_LEVELS > 2
l1tf_limit <<= PAGE_SHIFT - SWP_OFFSET_FIRST_BIT;
#endif
- pages = min_t(unsigned long, l1tf_limit, pages);
+ pages = min_t(unsigned long long, l1tf_limit, pages);
}
return pages;
}
diff --git a/arch/x86/mm/mmap.c b/arch/x86/mm/mmap.c
index f40ab8185d94..1e95d57760cf 100644
--- a/arch/x86/mm/mmap.c
+++ b/arch/x86/mm/mmap.c
@@ -257,7 +257,7 @@ bool pfn_modify_allowed(unsigned long pfn, pgprot_t prot)
/* If it's real memory always allow */
if (pfn_valid(pfn))
return true;
- if (pfn > l1tf_pfn_limit() && !capable(CAP_SYS_ADMIN))
+ if (pfn >= l1tf_pfn_limit() && !capable(CAP_SYS_ADMIN))
return false;
return true;
}
diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index 6eb1f34c3c85..cd2617285e2e 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -298,6 +298,10 @@ void switch_mm_irqs_off(struct mm_struct *prev, struct mm_struct *next,

choose_new_asid(next, next_tlb_gen, &new_asid, &need_flush);

+ /* Let nmi_uaccess_okay() know that we're changing CR3. */
+ this_cpu_write(cpu_tlbstate.loaded_mm, LOADED_MM_SWITCHING);
+ barrier();
+
if (need_flush) {
this_cpu_write(cpu_tlbstate.ctxs[new_asid].ctx_id, next->context.ctx_id);
this_cpu_write(cpu_tlbstate.ctxs[new_asid].tlb_gen, next_tlb_gen);
@@ -328,6 +332,9 @@ void switch_mm_irqs_off(struct mm_struct *prev, struct mm_struct *next,
if (next != &init_mm)
this_cpu_write(cpu_tlbstate.last_ctx_id, next->context.ctx_id);

+ /* Make sure we write CR3 before loaded_mm. */
+ barrier();
+
this_cpu_write(cpu_tlbstate.loaded_mm, next);
this_cpu_write(cpu_tlbstate.loaded_mm_asid, new_asid);
}
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index cc71c63df381..984b37647b2f 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6424,6 +6424,7 @@ void ata_host_init(struct ata_host *host, struct device *dev,
host->n_tags = ATA_MAX_QUEUE;
host->dev = dev;
host->ops = ops;
+ kref_init(&host->kref);
}

void __ata_port_probe(struct ata_port *ap)
@@ -7391,3 +7392,5 @@ EXPORT_SYMBOL_GPL(ata_cable_80wire);
EXPORT_SYMBOL_GPL(ata_cable_unknown);
EXPORT_SYMBOL_GPL(ata_cable_ignore);
EXPORT_SYMBOL_GPL(ata_cable_sata);
+EXPORT_SYMBOL_GPL(ata_host_get);
+EXPORT_SYMBOL_GPL(ata_host_put);
\ No newline at end of file
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 9e21c49cf6be..f953cb4bb1ba 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -100,8 +100,6 @@ extern int ata_port_probe(struct ata_port *ap);
extern void __ata_port_probe(struct ata_port *ap);
extern unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
u8 page, void *buf, unsigned int sectors);
-extern void ata_host_get(struct ata_host *host);
-extern void ata_host_put(struct ata_host *host);

#define to_ata_port(d) container_of(d, struct ata_port, tdev)

diff --git a/drivers/base/power/clock_ops.c b/drivers/base/power/clock_ops.c
index 8e2e4757adcb..5a42ae4078c2 100644
--- a/drivers/base/power/clock_ops.c
+++ b/drivers/base/power/clock_ops.c
@@ -185,7 +185,7 @@ EXPORT_SYMBOL_GPL(of_pm_clk_add_clk);
int of_pm_clk_add_clks(struct device *dev)
{
struct clk **clks;
- unsigned int i, count;
+ int i, count;
int ret;

if (!dev || !dev->of_node)
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index a78b8e7085e9..66acbd063562 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -2542,7 +2542,7 @@ static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
if (!CDROM_CAN(CDC_SELECT_DISC) ||
(arg == CDSL_CURRENT || arg == CDSL_NONE))
return cdi->ops->drive_status(cdi, CDSL_CURRENT);
- if (((int)arg >= cdi->capacity))
+ if (arg >= cdi->capacity)
return -EINVAL;
return cdrom_slot_status(cdi, arg);
}
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index e32f6e85dc6d..3a3a7a548a85 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -29,7 +29,6 @@
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/freezer.h>
-#include <linux/pm_runtime.h>
#include <linux/tpm_eventlog.h>

#include "tpm.h"
@@ -369,10 +368,13 @@ static int tpm_validate_command(struct tpm_chip *chip,
return -EINVAL;
}

-static int tpm_request_locality(struct tpm_chip *chip)
+static int tpm_request_locality(struct tpm_chip *chip, unsigned int flags)
{
int rc;

+ if (flags & TPM_TRANSMIT_RAW)
+ return 0;
+
if (!chip->ops->request_locality)
return 0;

@@ -385,10 +387,13 @@ static int tpm_request_locality(struct tpm_chip *chip)
return 0;
}

-static void tpm_relinquish_locality(struct tpm_chip *chip)
+static void tpm_relinquish_locality(struct tpm_chip *chip, unsigned int flags)
{
int rc;

+ if (flags & TPM_TRANSMIT_RAW)
+ return;
+
if (!chip->ops->relinquish_locality)
return;

@@ -399,6 +404,28 @@ static void tpm_relinquish_locality(struct tpm_chip *chip)
chip->locality = -1;
}

+static int tpm_cmd_ready(struct tpm_chip *chip, unsigned int flags)
+{
+ if (flags & TPM_TRANSMIT_RAW)
+ return 0;
+
+ if (!chip->ops->cmd_ready)
+ return 0;
+
+ return chip->ops->cmd_ready(chip);
+}
+
+static int tpm_go_idle(struct tpm_chip *chip, unsigned int flags)
+{
+ if (flags & TPM_TRANSMIT_RAW)
+ return 0;
+
+ if (!chip->ops->go_idle)
+ return 0;
+
+ return chip->ops->go_idle(chip);
+}
+
static ssize_t tpm_try_transmit(struct tpm_chip *chip,
struct tpm_space *space,
u8 *buf, size_t bufsiz,
@@ -423,7 +450,7 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip,
header->tag = cpu_to_be16(TPM2_ST_NO_SESSIONS);
header->return_code = cpu_to_be32(TPM2_RC_COMMAND_CODE |
TSS2_RESMGR_TPM_RC_LAYER);
- return bufsiz;
+ return sizeof(*header);
}

if (bufsiz > TPM_BUFSIZE)
@@ -449,14 +476,15 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip,
/* Store the decision as chip->locality will be changed. */
need_locality = chip->locality == -1;

- if (!(flags & TPM_TRANSMIT_RAW) && need_locality) {
- rc = tpm_request_locality(chip);
+ if (need_locality) {
+ rc = tpm_request_locality(chip, flags);
if (rc < 0)
goto out_no_locality;
}

- if (chip->dev.parent)
- pm_runtime_get_sync(chip->dev.parent);
+ rc = tpm_cmd_ready(chip, flags);
+ if (rc)
+ goto out;

rc = tpm2_prepare_space(chip, space, ordinal, buf);
if (rc)
@@ -516,13 +544,16 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip,
}

rc = tpm2_commit_space(chip, space, ordinal, buf, &len);
+ if (rc)
+ dev_err(&chip->dev, "tpm2_commit_space: error %d\n", rc);

out:
- if (chip->dev.parent)
- pm_runtime_put_sync(chip->dev.parent);
+ rc = tpm_go_idle(chip, flags);
+ if (rc)
+ goto out;

if (need_locality)
- tpm_relinquish_locality(chip);
+ tpm_relinquish_locality(chip, flags);

out_no_locality:
if (chip->ops->clk_enable != NULL)
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 4426649e431c..5f02dcd3df97 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -511,9 +511,17 @@ extern const struct file_operations tpm_fops;
extern const struct file_operations tpmrm_fops;
extern struct idr dev_nums_idr;

+/**
+ * enum tpm_transmit_flags
+ *
+ * @TPM_TRANSMIT_UNLOCKED: used to lock sequence of tpm_transmit calls.
+ * @TPM_TRANSMIT_RAW: prevent recursive calls into setup steps
+ * (go idle, locality,..). Always use with UNLOCKED
+ * as it will fail on double locking.
+ */
enum tpm_transmit_flags {
- TPM_TRANSMIT_UNLOCKED = BIT(0),
- TPM_TRANSMIT_RAW = BIT(1),
+ TPM_TRANSMIT_UNLOCKED = BIT(0),
+ TPM_TRANSMIT_RAW = BIT(1),
};

ssize_t tpm_transmit(struct tpm_chip *chip, struct tpm_space *space,
diff --git a/drivers/char/tpm/tpm2-space.c b/drivers/char/tpm/tpm2-space.c
index 6122d3276f72..11c85ed8c113 100644
--- a/drivers/char/tpm/tpm2-space.c
+++ b/drivers/char/tpm/tpm2-space.c
@@ -39,7 +39,8 @@ static void tpm2_flush_sessions(struct tpm_chip *chip, struct tpm_space *space)
for (i = 0; i < ARRAY_SIZE(space->session_tbl); i++) {
if (space->session_tbl[i])
tpm2_flush_context_cmd(chip, space->session_tbl[i],
- TPM_TRANSMIT_UNLOCKED);
+ TPM_TRANSMIT_UNLOCKED |
+ TPM_TRANSMIT_RAW);
}
}

@@ -84,7 +85,7 @@ static int tpm2_load_context(struct tpm_chip *chip, u8 *buf,
tpm_buf_append(&tbuf, &buf[*offset], body_size);

rc = tpm_transmit_cmd(chip, NULL, tbuf.data, PAGE_SIZE, 4,
- TPM_TRANSMIT_UNLOCKED, NULL);
+ TPM_TRANSMIT_UNLOCKED | TPM_TRANSMIT_RAW, NULL);
if (rc < 0) {
dev_warn(&chip->dev, "%s: failed with a system error %d\n",
__func__, rc);
@@ -133,7 +134,7 @@ static int tpm2_save_context(struct tpm_chip *chip, u32 handle, u8 *buf,
tpm_buf_append_u32(&tbuf, handle);

rc = tpm_transmit_cmd(chip, NULL, tbuf.data, PAGE_SIZE, 0,
- TPM_TRANSMIT_UNLOCKED, NULL);
+ TPM_TRANSMIT_UNLOCKED | TPM_TRANSMIT_RAW, NULL);
if (rc < 0) {
dev_warn(&chip->dev, "%s: failed with a system error %d\n",
__func__, rc);
@@ -170,7 +171,8 @@ static void tpm2_flush_space(struct tpm_chip *chip)
for (i = 0; i < ARRAY_SIZE(space->context_tbl); i++)
if (space->context_tbl[i] && ~space->context_tbl[i])
tpm2_flush_context_cmd(chip, space->context_tbl[i],
- TPM_TRANSMIT_UNLOCKED);
+ TPM_TRANSMIT_UNLOCKED |
+ TPM_TRANSMIT_RAW);

tpm2_flush_sessions(chip, space);
}
@@ -377,7 +379,8 @@ static int tpm2_map_response_header(struct tpm_chip *chip, u32 cc, u8 *rsp,

return 0;
out_no_slots:
- tpm2_flush_context_cmd(chip, phandle, TPM_TRANSMIT_UNLOCKED);
+ tpm2_flush_context_cmd(chip, phandle,
+ TPM_TRANSMIT_UNLOCKED | TPM_TRANSMIT_RAW);
dev_warn(&chip->dev, "%s: out of slots for 0x%08X\n", __func__,
phandle);
return -ENOMEM;
@@ -465,7 +468,8 @@ static int tpm2_save_space(struct tpm_chip *chip)
return rc;

tpm2_flush_context_cmd(chip, space->context_tbl[i],
- TPM_TRANSMIT_UNLOCKED);
+ TPM_TRANSMIT_UNLOCKED |
+ TPM_TRANSMIT_RAW);
space->context_tbl[i] = ~0;
}

diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
index 34fbc6cb097b..36952ef98f90 100644
--- a/drivers/char/tpm/tpm_crb.c
+++ b/drivers/char/tpm/tpm_crb.c
@@ -132,7 +132,7 @@ static bool crb_wait_for_reg_32(u32 __iomem *reg, u32 mask, u32 value,
}

/**
- * crb_go_idle - request tpm crb device to go the idle state
+ * __crb_go_idle - request tpm crb device to go the idle state
*
* @dev: crb device
* @priv: crb private data
@@ -147,7 +147,7 @@ static bool crb_wait_for_reg_32(u32 __iomem *reg, u32 mask, u32 value,
*
* Return: 0 always
*/
-static int crb_go_idle(struct device *dev, struct crb_priv *priv)
+static int __crb_go_idle(struct device *dev, struct crb_priv *priv)
{
if ((priv->sm == ACPI_TPM2_START_METHOD) ||
(priv->sm == ACPI_TPM2_COMMAND_BUFFER_WITH_START_METHOD) ||
@@ -163,11 +163,20 @@ static int crb_go_idle(struct device *dev, struct crb_priv *priv)
dev_warn(dev, "goIdle timed out\n");
return -ETIME;
}
+
return 0;
}

+static int crb_go_idle(struct tpm_chip *chip)
+{
+ struct device *dev = &chip->dev;
+ struct crb_priv *priv = dev_get_drvdata(dev);
+
+ return __crb_go_idle(dev, priv);
+}
+
/**
- * crb_cmd_ready - request tpm crb device to enter ready state
+ * __crb_cmd_ready - request tpm crb device to enter ready state
*
* @dev: crb device
* @priv: crb private data
@@ -181,7 +190,7 @@ static int crb_go_idle(struct device *dev, struct crb_priv *priv)
*
* Return: 0 on success -ETIME on timeout;
*/
-static int crb_cmd_ready(struct device *dev, struct crb_priv *priv)
+static int __crb_cmd_ready(struct device *dev, struct crb_priv *priv)
{
if ((priv->sm == ACPI_TPM2_START_METHOD) ||
(priv->sm == ACPI_TPM2_COMMAND_BUFFER_WITH_START_METHOD) ||
@@ -200,6 +209,14 @@ static int crb_cmd_ready(struct device *dev, struct crb_priv *priv)
return 0;
}

+static int crb_cmd_ready(struct tpm_chip *chip)
+{
+ struct device *dev = &chip->dev;
+ struct crb_priv *priv = dev_get_drvdata(dev);
+
+ return __crb_cmd_ready(dev, priv);
+}
+
static int __crb_request_locality(struct device *dev,
struct crb_priv *priv, int loc)
{
@@ -401,6 +418,8 @@ static const struct tpm_class_ops tpm_crb = {
.send = crb_send,
.cancel = crb_cancel,
.req_canceled = crb_req_canceled,
+ .go_idle = crb_go_idle,
+ .cmd_ready = crb_cmd_ready,
.request_locality = crb_request_locality,
.relinquish_locality = crb_relinquish_locality,
.req_complete_mask = CRB_DRV_STS_COMPLETE,
@@ -520,7 +539,7 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv,
* PTT HW bug w/a: wake up the device to access
* possibly not retained registers.
*/
- ret = crb_cmd_ready(dev, priv);
+ ret = __crb_cmd_ready(dev, priv);
if (ret)
goto out_relinquish_locality;

@@ -565,7 +584,7 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv,
if (!ret)
priv->cmd_size = cmd_size;

- crb_go_idle(dev, priv);
+ __crb_go_idle(dev, priv);

out_relinquish_locality:

@@ -628,32 +647,7 @@ static int crb_acpi_add(struct acpi_device *device)
chip->acpi_dev_handle = device->handle;
chip->flags = TPM_CHIP_FLAG_TPM2;

- rc = __crb_request_locality(dev, priv, 0);
- if (rc)
- return rc;
-
- rc = crb_cmd_ready(dev, priv);
- if (rc)
- goto out;
-
- pm_runtime_get_noresume(dev);
- pm_runtime_set_active(dev);
- pm_runtime_enable(dev);
-
- rc = tpm_chip_register(chip);
- if (rc) {
- crb_go_idle(dev, priv);
- pm_runtime_put_noidle(dev);
- pm_runtime_disable(dev);
- goto out;
- }
-
- pm_runtime_put_sync(dev);
-
-out:
- __crb_relinquish_locality(dev, priv, 0);
-
- return rc;
+ return tpm_chip_register(chip);
}

static int crb_acpi_remove(struct acpi_device *device)
@@ -663,52 +657,11 @@ static int crb_acpi_remove(struct acpi_device *device)

tpm_chip_unregister(chip);

- pm_runtime_disable(dev);
-
return 0;
}

-static int __maybe_unused crb_pm_runtime_suspend(struct device *dev)
-{
- struct tpm_chip *chip = dev_get_drvdata(dev);
- struct crb_priv *priv = dev_get_drvdata(&chip->dev);
-
- return crb_go_idle(dev, priv);
-}
-
-static int __maybe_unused crb_pm_runtime_resume(struct device *dev)
-{
- struct tpm_chip *chip = dev_get_drvdata(dev);
- struct crb_priv *priv = dev_get_drvdata(&chip->dev);
-
- return crb_cmd_ready(dev, priv);
-}
-
-static int __maybe_unused crb_pm_suspend(struct device *dev)
-{
- int ret;
-
- ret = tpm_pm_suspend(dev);
- if (ret)
- return ret;
-
- return crb_pm_runtime_suspend(dev);
-}
-
-static int __maybe_unused crb_pm_resume(struct device *dev)
-{
- int ret;
-
- ret = crb_pm_runtime_resume(dev);
- if (ret)
- return ret;
-
- return tpm_pm_resume(dev);
-}
-
static const struct dev_pm_ops crb_pm = {
- SET_SYSTEM_SLEEP_PM_OPS(crb_pm_suspend, crb_pm_resume)
- SET_RUNTIME_PM_OPS(crb_pm_runtime_suspend, crb_pm_runtime_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(tpm_pm_suspend, tpm_pm_resume)
};

static const struct acpi_device_id crb_device_ids[] = {
diff --git a/drivers/clk/clk-npcm7xx.c b/drivers/clk/clk-npcm7xx.c
index 740af90a9508..c5edf8f2fd19 100644
--- a/drivers/clk/clk-npcm7xx.c
+++ b/drivers/clk/clk-npcm7xx.c
@@ -558,8 +558,8 @@ static void __init npcm7xx_clk_init(struct device_node *clk_np)
if (!clk_base)
goto npcm7xx_init_error;

- npcm7xx_clk_data = kzalloc(sizeof(*npcm7xx_clk_data->hws) *
- NPCM7XX_NUM_CLOCKS + sizeof(npcm7xx_clk_data), GFP_KERNEL);
+ npcm7xx_clk_data = kzalloc(struct_size(npcm7xx_clk_data, hws,
+ NPCM7XX_NUM_CLOCKS), GFP_KERNEL);
if (!npcm7xx_clk_data)
goto npcm7xx_init_np_err;

diff --git a/drivers/clk/rockchip/clk-rk3399.c b/drivers/clk/rockchip/clk-rk3399.c
index bca10d618f0a..2a8634a52856 100644
--- a/drivers/clk/rockchip/clk-rk3399.c
+++ b/drivers/clk/rockchip/clk-rk3399.c
@@ -631,7 +631,7 @@ static struct rockchip_clk_branch rk3399_clk_branches[] __initdata = {
MUX(0, "clk_i2sout_src", mux_i2sch_p, CLK_SET_RATE_PARENT,
RK3399_CLKSEL_CON(31), 0, 2, MFLAGS),
COMPOSITE_NODIV(SCLK_I2S_8CH_OUT, "clk_i2sout", mux_i2sout_p, CLK_SET_RATE_PARENT,
- RK3399_CLKSEL_CON(30), 8, 2, MFLAGS,
+ RK3399_CLKSEL_CON(31), 2, 1, MFLAGS,
RK3399_CLKGATE_CON(8), 12, GFLAGS),

/* uart */
diff --git a/drivers/gpu/drm/udl/udl_drv.h b/drivers/gpu/drm/udl/udl_drv.h
index 55c0cc309198..7588a9eb0ee0 100644
--- a/drivers/gpu/drm/udl/udl_drv.h
+++ b/drivers/gpu/drm/udl/udl_drv.h
@@ -112,7 +112,7 @@ udl_fb_user_fb_create(struct drm_device *dev,
struct drm_file *file,
const struct drm_mode_fb_cmd2 *mode_cmd);

-int udl_render_hline(struct drm_device *dev, int bpp, struct urb **urb_ptr,
+int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
const char *front, char **urb_buf_ptr,
u32 byte_offset, u32 device_byte_offset, u32 byte_width,
int *ident_ptr, int *sent_ptr);
diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c
index d5583190f3e4..8746eeeec44d 100644
--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -90,7 +90,10 @@ int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
int bytes_identical = 0;
struct urb *urb;
int aligned_x;
- int bpp = fb->base.format->cpp[0];
+ int log_bpp;
+
+ BUG_ON(!is_power_of_2(fb->base.format->cpp[0]));
+ log_bpp = __ffs(fb->base.format->cpp[0]);

if (!fb->active_16)
return 0;
@@ -125,12 +128,12 @@ int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,

for (i = y; i < y + height ; i++) {
const int line_offset = fb->base.pitches[0] * i;
- const int byte_offset = line_offset + (x * bpp);
- const int dev_byte_offset = (fb->base.width * bpp * i) + (x * bpp);
- if (udl_render_hline(dev, bpp, &urb,
+ const int byte_offset = line_offset + (x << log_bpp);
+ const int dev_byte_offset = (fb->base.width * i + x) << log_bpp;
+ if (udl_render_hline(dev, log_bpp, &urb,
(char *) fb->obj->vmapping,
&cmd, byte_offset, dev_byte_offset,
- width * bpp,
+ width << log_bpp,
&bytes_identical, &bytes_sent))
goto error;
}
@@ -149,7 +152,7 @@ int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
error:
atomic_add(bytes_sent, &udl->bytes_sent);
atomic_add(bytes_identical, &udl->bytes_identical);
- atomic_add(width*height*bpp, &udl->bytes_rendered);
+ atomic_add((width * height) << log_bpp, &udl->bytes_rendered);
end_cycles = get_cycles();
atomic_add(((unsigned int) ((end_cycles - start_cycles)
>> 10)), /* Kcycles */
@@ -221,7 +224,7 @@ static int udl_fb_open(struct fb_info *info, int user)

struct fb_deferred_io *fbdefio;

- fbdefio = kmalloc(sizeof(struct fb_deferred_io), GFP_KERNEL);
+ fbdefio = kzalloc(sizeof(struct fb_deferred_io), GFP_KERNEL);

if (fbdefio) {
fbdefio->delay = DL_DEFIO_WRITE_DELAY;
diff --git a/drivers/gpu/drm/udl/udl_main.c b/drivers/gpu/drm/udl/udl_main.c
index d518de8f496b..7e9ad926926a 100644
--- a/drivers/gpu/drm/udl/udl_main.c
+++ b/drivers/gpu/drm/udl/udl_main.c
@@ -170,18 +170,13 @@ static void udl_free_urb_list(struct drm_device *dev)
struct list_head *node;
struct urb_node *unode;
struct urb *urb;
- int ret;
unsigned long flags;

DRM_DEBUG("Waiting for completes and freeing all render urbs\n");

/* keep waiting and freeing, until we've got 'em all */
while (count--) {
-
- /* Getting interrupted means a leak, but ok at shutdown*/
- ret = down_interruptible(&udl->urbs.limit_sem);
- if (ret)
- break;
+ down(&udl->urbs.limit_sem);

spin_lock_irqsave(&udl->urbs.lock, flags);

@@ -205,17 +200,22 @@ static void udl_free_urb_list(struct drm_device *dev)
static int udl_alloc_urb_list(struct drm_device *dev, int count, size_t size)
{
struct udl_device *udl = dev->dev_private;
- int i = 0;
struct urb *urb;
struct urb_node *unode;
char *buf;
+ size_t wanted_size = count * size;

spin_lock_init(&udl->urbs.lock);

+retry:
udl->urbs.size = size;
INIT_LIST_HEAD(&udl->urbs.list);

- while (i < count) {
+ sema_init(&udl->urbs.limit_sem, 0);
+ udl->urbs.count = 0;
+ udl->urbs.available = 0;
+
+ while (udl->urbs.count * size < wanted_size) {
unode = kzalloc(sizeof(struct urb_node), GFP_KERNEL);
if (!unode)
break;
@@ -231,11 +231,16 @@ static int udl_alloc_urb_list(struct drm_device *dev, int count, size_t size)
}
unode->urb = urb;

- buf = usb_alloc_coherent(udl->udev, MAX_TRANSFER, GFP_KERNEL,
+ buf = usb_alloc_coherent(udl->udev, size, GFP_KERNEL,
&urb->transfer_dma);
if (!buf) {
kfree(unode);
usb_free_urb(urb);
+ if (size > PAGE_SIZE) {
+ size /= 2;
+ udl_free_urb_list(dev);
+ goto retry;
+ }
break;
}

@@ -246,16 +251,14 @@ static int udl_alloc_urb_list(struct drm_device *dev, int count, size_t size)

list_add_tail(&unode->entry, &udl->urbs.list);

- i++;
+ up(&udl->urbs.limit_sem);
+ udl->urbs.count++;
+ udl->urbs.available++;
}

- sema_init(&udl->urbs.limit_sem, i);
- udl->urbs.count = i;
- udl->urbs.available = i;
-
- DRM_DEBUG("allocated %d %d byte urbs\n", i, (int) size);
+ DRM_DEBUG("allocated %d %d byte urbs\n", udl->urbs.count, (int) size);

- return i;
+ return udl->urbs.count;
}

struct urb *udl_get_urb(struct drm_device *dev)
diff --git a/drivers/gpu/drm/udl/udl_transfer.c b/drivers/gpu/drm/udl/udl_transfer.c
index b992644c17e6..f3331d33547a 100644
--- a/drivers/gpu/drm/udl/udl_transfer.c
+++ b/drivers/gpu/drm/udl/udl_transfer.c
@@ -83,12 +83,12 @@ static inline u16 pixel32_to_be16(const uint32_t pixel)
((pixel >> 8) & 0xf800));
}

-static inline u16 get_pixel_val16(const uint8_t *pixel, int bpp)
+static inline u16 get_pixel_val16(const uint8_t *pixel, int log_bpp)
{
- u16 pixel_val16 = 0;
- if (bpp == 2)
+ u16 pixel_val16;
+ if (log_bpp == 1)
pixel_val16 = *(const uint16_t *)pixel;
- else if (bpp == 4)
+ else
pixel_val16 = pixel32_to_be16(*(const uint32_t *)pixel);
return pixel_val16;
}
@@ -125,8 +125,9 @@ static void udl_compress_hline16(
const u8 *const pixel_end,
uint32_t *device_address_ptr,
uint8_t **command_buffer_ptr,
- const uint8_t *const cmd_buffer_end, int bpp)
+ const uint8_t *const cmd_buffer_end, int log_bpp)
{
+ const int bpp = 1 << log_bpp;
const u8 *pixel = *pixel_start_ptr;
uint32_t dev_addr = *device_address_ptr;
uint8_t *cmd = *command_buffer_ptr;
@@ -153,12 +154,12 @@ static void udl_compress_hline16(
raw_pixels_count_byte = cmd++; /* we'll know this later */
raw_pixel_start = pixel;

- cmd_pixel_end = pixel + min3(MAX_CMD_PIXELS + 1UL,
- (unsigned long)(pixel_end - pixel) / bpp,
- (unsigned long)(cmd_buffer_end - 1 - cmd) / 2) * bpp;
+ cmd_pixel_end = pixel + (min3(MAX_CMD_PIXELS + 1UL,
+ (unsigned long)(pixel_end - pixel) >> log_bpp,
+ (unsigned long)(cmd_buffer_end - 1 - cmd) / 2) << log_bpp);

prefetch_range((void *) pixel, cmd_pixel_end - pixel);
- pixel_val16 = get_pixel_val16(pixel, bpp);
+ pixel_val16 = get_pixel_val16(pixel, log_bpp);

while (pixel < cmd_pixel_end) {
const u8 *const start = pixel;
@@ -170,7 +171,7 @@ static void udl_compress_hline16(
pixel += bpp;

while (pixel < cmd_pixel_end) {
- pixel_val16 = get_pixel_val16(pixel, bpp);
+ pixel_val16 = get_pixel_val16(pixel, log_bpp);
if (pixel_val16 != repeating_pixel_val16)
break;
pixel += bpp;
@@ -179,10 +180,10 @@ static void udl_compress_hline16(
if (unlikely(pixel > start + bpp)) {
/* go back and fill in raw pixel count */
*raw_pixels_count_byte = (((start -
- raw_pixel_start) / bpp) + 1) & 0xFF;
+ raw_pixel_start) >> log_bpp) + 1) & 0xFF;

/* immediately after raw data is repeat byte */
- *cmd++ = (((pixel - start) / bpp) - 1) & 0xFF;
+ *cmd++ = (((pixel - start) >> log_bpp) - 1) & 0xFF;

/* Then start another raw pixel span */
raw_pixel_start = pixel;
@@ -192,14 +193,14 @@ static void udl_compress_hline16(

if (pixel > raw_pixel_start) {
/* finalize last RAW span */
- *raw_pixels_count_byte = ((pixel-raw_pixel_start) / bpp) & 0xFF;
+ *raw_pixels_count_byte = ((pixel - raw_pixel_start) >> log_bpp) & 0xFF;
} else {
/* undo unused byte */
cmd--;
}

- *cmd_pixels_count_byte = ((pixel - cmd_pixel_start) / bpp) & 0xFF;
- dev_addr += ((pixel - cmd_pixel_start) / bpp) * 2;
+ *cmd_pixels_count_byte = ((pixel - cmd_pixel_start) >> log_bpp) & 0xFF;
+ dev_addr += ((pixel - cmd_pixel_start) >> log_bpp) * 2;
}

if (cmd_buffer_end <= MIN_RLX_CMD_BYTES + cmd) {
@@ -222,19 +223,19 @@ static void udl_compress_hline16(
* (that we can only write to, slowly, and can never read), and (optionally)
* our shadow copy that tracks what's been sent to that hardware buffer.
*/
-int udl_render_hline(struct drm_device *dev, int bpp, struct urb **urb_ptr,
+int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
const char *front, char **urb_buf_ptr,
u32 byte_offset, u32 device_byte_offset,
u32 byte_width,
int *ident_ptr, int *sent_ptr)
{
const u8 *line_start, *line_end, *next_pixel;
- u32 base16 = 0 + (device_byte_offset / bpp) * 2;
+ u32 base16 = 0 + (device_byte_offset >> log_bpp) * 2;
struct urb *urb = *urb_ptr;
u8 *cmd = *urb_buf_ptr;
u8 *cmd_end = (u8 *) urb->transfer_buffer + urb->transfer_buffer_length;

- BUG_ON(!(bpp == 2 || bpp == 4));
+ BUG_ON(!(log_bpp == 1 || log_bpp == 2));

line_start = (u8 *) (front + byte_offset);
next_pixel = line_start;
@@ -244,7 +245,7 @@ int udl_render_hline(struct drm_device *dev, int bpp, struct urb **urb_ptr,

udl_compress_hline16(&next_pixel,
line_end, &base16,
- (u8 **) &cmd, (u8 *) cmd_end, bpp);
+ (u8 **) &cmd, (u8 *) cmd_end, log_bpp);

if (cmd >= cmd_end) {
int len = cmd - (u8 *) urb->transfer_buffer;
diff --git a/drivers/hwmon/k10temp.c b/drivers/hwmon/k10temp.c
index 17c6460ae351..577e2ede5a1a 100644
--- a/drivers/hwmon/k10temp.c
+++ b/drivers/hwmon/k10temp.c
@@ -105,6 +105,8 @@ static const struct tctl_offset tctl_offset_table[] = {
{ 0x17, "AMD Ryzen Threadripper 1950", 10000 },
{ 0x17, "AMD Ryzen Threadripper 1920", 10000 },
{ 0x17, "AMD Ryzen Threadripper 1910", 10000 },
+ { 0x17, "AMD Ryzen Threadripper 2950X", 27000 },
+ { 0x17, "AMD Ryzen Threadripper 2990WX", 27000 },
};

static void read_htcreg_pci(struct pci_dev *pdev, u32 *regval)
diff --git a/drivers/hwmon/nct6775.c b/drivers/hwmon/nct6775.c
index f9d1349c3286..b89e8379d898 100644
--- a/drivers/hwmon/nct6775.c
+++ b/drivers/hwmon/nct6775.c
@@ -63,6 +63,7 @@
#include <linux/bitops.h>
#include <linux/dmi.h>
#include <linux/io.h>
+#include <linux/nospec.h>
#include "lm75.h"

#define USE_ALTERNATE
@@ -2689,6 +2690,7 @@ store_pwm_weight_temp_sel(struct device *dev, struct device_attribute *attr,
return err;
if (val > NUM_TEMP)
return -EINVAL;
+ val = array_index_nospec(val, NUM_TEMP + 1);
if (val && (!(data->have_temp & BIT(val - 1)) ||
!data->temp_src[val - 1]))
return -EINVAL;
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index f7a96bcf94a6..5349e22b5c78 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -2103,12 +2103,16 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
if (err)
return err;

- if (smmu->version == ARM_SMMU_V2 &&
- smmu->num_context_banks != smmu->num_context_irqs) {
- dev_err(dev,
- "found only %d context interrupt(s) but %d required\n",
- smmu->num_context_irqs, smmu->num_context_banks);
- return -ENODEV;
+ if (smmu->version == ARM_SMMU_V2) {
+ if (smmu->num_context_banks > smmu->num_context_irqs) {
+ dev_err(dev,
+ "found only %d context irq(s) but %d required\n",
+ smmu->num_context_irqs, smmu->num_context_banks);
+ return -ENODEV;
+ }
+
+ /* Ignore superfluous interrupts */
+ smmu->num_context_irqs = smmu->num_context_banks;
}

for (i = 0; i < smmu->num_global_irqs; ++i) {
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 7465f17e1559..38175ebd92d4 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -312,7 +312,6 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
}
}

- *offset = 0;
cb = mei_cl_alloc_cb(cl, length, MEI_FOP_WRITE, file);
if (!cb) {
rets = -ENOMEM;
diff --git a/drivers/mtd/nand/raw/fsmc_nand.c b/drivers/mtd/nand/raw/fsmc_nand.c
index f4a5a317d4ae..e1086a010b88 100644
--- a/drivers/mtd/nand/raw/fsmc_nand.c
+++ b/drivers/mtd/nand/raw/fsmc_nand.c
@@ -740,7 +740,7 @@ static int fsmc_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
for (i = 0, s = 0; s < eccsteps; s++, i += eccbytes, p += eccsize) {
nand_read_page_op(chip, page, s * eccsize, NULL, 0);
chip->ecc.hwctl(mtd, NAND_ECC_READ);
- chip->read_buf(mtd, p, eccsize);
+ nand_read_data_op(chip, p, eccsize, false);

for (j = 0; j < eccbytes;) {
struct mtd_oob_region oobregion;
diff --git a/drivers/mtd/nand/raw/marvell_nand.c b/drivers/mtd/nand/raw/marvell_nand.c
index ebb1d141b900..c88588815ca1 100644
--- a/drivers/mtd/nand/raw/marvell_nand.c
+++ b/drivers/mtd/nand/raw/marvell_nand.c
@@ -2677,6 +2677,21 @@ static int marvell_nfc_init_dma(struct marvell_nfc *nfc)
return 0;
}

+static void marvell_nfc_reset(struct marvell_nfc *nfc)
+{
+ /*
+ * ECC operations and interruptions are only enabled when specifically
+ * needed. ECC shall not be activated in the early stages (fails probe).
+ * Arbiter flag, even if marked as "reserved", must be set (empirical).
+ * SPARE_EN bit must always be set or ECC bytes will not be at the same
+ * offset in the read page and this will fail the protection.
+ */
+ writel_relaxed(NDCR_ALL_INT | NDCR_ND_ARB_EN | NDCR_SPARE_EN |
+ NDCR_RD_ID_CNT(NFCV1_READID_LEN), nfc->regs + NDCR);
+ writel_relaxed(0xFFFFFFFF, nfc->regs + NDSR);
+ writel_relaxed(0, nfc->regs + NDECCCTRL);
+}
+
static int marvell_nfc_init(struct marvell_nfc *nfc)
{
struct device_node *np = nfc->dev->of_node;
@@ -2715,17 +2730,7 @@ static int marvell_nfc_init(struct marvell_nfc *nfc)
if (!nfc->caps->is_nfcv2)
marvell_nfc_init_dma(nfc);

- /*
- * ECC operations and interruptions are only enabled when specifically
- * needed. ECC shall not be activated in the early stages (fails probe).
- * Arbiter flag, even if marked as "reserved", must be set (empirical).
- * SPARE_EN bit must always be set or ECC bytes will not be at the same
- * offset in the read page and this will fail the protection.
- */
- writel_relaxed(NDCR_ALL_INT | NDCR_ND_ARB_EN | NDCR_SPARE_EN |
- NDCR_RD_ID_CNT(NFCV1_READID_LEN), nfc->regs + NDCR);
- writel_relaxed(0xFFFFFFFF, nfc->regs + NDSR);
- writel_relaxed(0, nfc->regs + NDECCCTRL);
+ marvell_nfc_reset(nfc);

return 0;
}
@@ -2840,6 +2845,51 @@ static int marvell_nfc_remove(struct platform_device *pdev)
return 0;
}

+static int __maybe_unused marvell_nfc_suspend(struct device *dev)
+{
+ struct marvell_nfc *nfc = dev_get_drvdata(dev);
+ struct marvell_nand_chip *chip;
+
+ list_for_each_entry(chip, &nfc->chips, node)
+ marvell_nfc_wait_ndrun(&chip->chip);
+
+ clk_disable_unprepare(nfc->reg_clk);
+ clk_disable_unprepare(nfc->core_clk);
+
+ return 0;
+}
+
+static int __maybe_unused marvell_nfc_resume(struct device *dev)
+{
+ struct marvell_nfc *nfc = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(nfc->core_clk);
+ if (ret < 0)
+ return ret;
+
+ if (!IS_ERR(nfc->reg_clk)) {
+ ret = clk_prepare_enable(nfc->reg_clk);
+ if (ret < 0)
+ return ret;
+ }
+
+ /*
+ * Reset nfc->selected_chip so the next command will cause the timing
+ * registers to be restored in marvell_nfc_select_chip().
+ */
+ nfc->selected_chip = NULL;
+
+ /* Reset registers that have lost their contents */
+ marvell_nfc_reset(nfc);
+
+ return 0;
+}
+
+static const struct dev_pm_ops marvell_nfc_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(marvell_nfc_suspend, marvell_nfc_resume)
+};
+
static const struct marvell_nfc_caps marvell_armada_8k_nfc_caps = {
.max_cs_nb = 4,
.max_rb_nb = 2,
@@ -2924,6 +2974,7 @@ static struct platform_driver marvell_nfc_driver = {
.driver = {
.name = "marvell-nfc",
.of_match_table = marvell_nfc_of_ids,
+ .pm = &marvell_nfc_pm_ops,
},
.id_table = marvell_nfc_platform_ids,
.probe = marvell_nfc_probe,
diff --git a/drivers/mtd/nand/raw/nand_hynix.c b/drivers/mtd/nand/raw/nand_hynix.c
index d542908a0ebb..766df4134482 100644
--- a/drivers/mtd/nand/raw/nand_hynix.c
+++ b/drivers/mtd/nand/raw/nand_hynix.c
@@ -100,6 +100,16 @@ static int hynix_nand_reg_write_op(struct nand_chip *chip, u8 addr, u8 val)
struct mtd_info *mtd = nand_to_mtd(chip);
u16 column = ((u16)addr << 8) | addr;

+ if (chip->exec_op) {
+ struct nand_op_instr instrs[] = {
+ NAND_OP_ADDR(1, &addr, 0),
+ NAND_OP_8BIT_DATA_OUT(1, &val, 0),
+ };
+ struct nand_operation op = NAND_OPERATION(instrs);
+
+ return nand_exec_op(chip, &op);
+ }
+
chip->cmdfunc(mtd, NAND_CMD_NONE, column, -1);
chip->write_byte(mtd, val);

diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c
index 6a5519f0ff25..49b4e70fefe7 100644
--- a/drivers/mtd/nand/raw/qcom_nandc.c
+++ b/drivers/mtd/nand/raw/qcom_nandc.c
@@ -213,6 +213,8 @@ nandc_set_reg(nandc, NAND_READ_LOCATION_##reg, \
#define QPIC_PER_CW_CMD_SGL 32
#define QPIC_PER_CW_DATA_SGL 8

+#define QPIC_NAND_COMPLETION_TIMEOUT msecs_to_jiffies(2000)
+
/*
* Flags used in DMA descriptor preparation helper functions
* (i.e. read_reg_dma/write_reg_dma/read_data_dma/write_data_dma)
@@ -245,6 +247,11 @@ nandc_set_reg(nandc, NAND_READ_LOCATION_##reg, \
* @tx_sgl_start - start index in data sgl for tx.
* @rx_sgl_pos - current index in data sgl for rx.
* @rx_sgl_start - start index in data sgl for rx.
+ * @wait_second_completion - wait for second DMA desc completion before making
+ * the NAND transfer completion.
+ * @txn_done - completion for NAND transfer.
+ * @last_data_desc - last DMA desc in data channel (tx/rx).
+ * @last_cmd_desc - last DMA desc in command channel.
*/
struct bam_transaction {
struct bam_cmd_element *bam_ce;
@@ -258,6 +265,10 @@ struct bam_transaction {
u32 tx_sgl_start;
u32 rx_sgl_pos;
u32 rx_sgl_start;
+ bool wait_second_completion;
+ struct completion txn_done;
+ struct dma_async_tx_descriptor *last_data_desc;
+ struct dma_async_tx_descriptor *last_cmd_desc;
};

/*
@@ -504,6 +515,8 @@ alloc_bam_transaction(struct qcom_nand_controller *nandc)

bam_txn->data_sgl = bam_txn_buf;

+ init_completion(&bam_txn->txn_done);
+
return bam_txn;
}

@@ -523,11 +536,33 @@ static void clear_bam_transaction(struct qcom_nand_controller *nandc)
bam_txn->tx_sgl_start = 0;
bam_txn->rx_sgl_pos = 0;
bam_txn->rx_sgl_start = 0;
+ bam_txn->last_data_desc = NULL;
+ bam_txn->wait_second_completion = false;

sg_init_table(bam_txn->cmd_sgl, nandc->max_cwperpage *
QPIC_PER_CW_CMD_SGL);
sg_init_table(bam_txn->data_sgl, nandc->max_cwperpage *
QPIC_PER_CW_DATA_SGL);
+
+ reinit_completion(&bam_txn->txn_done);
+}
+
+/* Callback for DMA descriptor completion */
+static void qpic_bam_dma_done(void *data)
+{
+ struct bam_transaction *bam_txn = data;
+
+ /*
+ * In case of data transfer with NAND, 2 callbacks will be generated.
+ * One for command channel and another one for data channel.
+ * If current transaction has data descriptors
+ * (i.e. wait_second_completion is true), then set this to false
+ * and wait for second DMA descriptor completion.
+ */
+ if (bam_txn->wait_second_completion)
+ bam_txn->wait_second_completion = false;
+ else
+ complete(&bam_txn->txn_done);
}

static inline struct qcom_nand_host *to_qcom_nand_host(struct nand_chip *chip)
@@ -756,6 +791,12 @@ static int prepare_bam_async_desc(struct qcom_nand_controller *nandc,

desc->dma_desc = dma_desc;

+ /* update last data/command descriptor */
+ if (chan == nandc->cmd_chan)
+ bam_txn->last_cmd_desc = dma_desc;
+ else
+ bam_txn->last_data_desc = dma_desc;
+
list_add_tail(&desc->node, &nandc->desc_list);

return 0;
@@ -1273,10 +1314,20 @@ static int submit_descs(struct qcom_nand_controller *nandc)
cookie = dmaengine_submit(desc->dma_desc);

if (nandc->props->is_bam) {
+ bam_txn->last_cmd_desc->callback = qpic_bam_dma_done;
+ bam_txn->last_cmd_desc->callback_param = bam_txn;
+ if (bam_txn->last_data_desc) {
+ bam_txn->last_data_desc->callback = qpic_bam_dma_done;
+ bam_txn->last_data_desc->callback_param = bam_txn;
+ bam_txn->wait_second_completion = true;
+ }
+
dma_async_issue_pending(nandc->tx_chan);
dma_async_issue_pending(nandc->rx_chan);
+ dma_async_issue_pending(nandc->cmd_chan);

- if (dma_sync_wait(nandc->cmd_chan, cookie) != DMA_COMPLETE)
+ if (!wait_for_completion_timeout(&bam_txn->txn_done,
+ QPIC_NAND_COMPLETION_TIMEOUT))
return -ETIMEDOUT;
} else {
if (dma_sync_wait(nandc->chan, cookie) != DMA_COMPLETE)
diff --git a/drivers/net/wireless/broadcom/b43/leds.c b/drivers/net/wireless/broadcom/b43/leds.c
index cb987c2ecc6b..87131f663292 100644
--- a/drivers/net/wireless/broadcom/b43/leds.c
+++ b/drivers/net/wireless/broadcom/b43/leds.c
@@ -131,7 +131,7 @@ static int b43_register_led(struct b43_wldev *dev, struct b43_led *led,
led->wl = dev->wl;
led->index = led_index;
led->activelow = activelow;
- strncpy(led->name, name, sizeof(led->name));
+ strlcpy(led->name, name, sizeof(led->name));
atomic_set(&led->state, 0);

led->led_dev.name = led->name;
diff --git a/drivers/net/wireless/broadcom/b43legacy/leds.c b/drivers/net/wireless/broadcom/b43legacy/leds.c
index fd4565389c77..bc922118b6ac 100644
--- a/drivers/net/wireless/broadcom/b43legacy/leds.c
+++ b/drivers/net/wireless/broadcom/b43legacy/leds.c
@@ -101,7 +101,7 @@ static int b43legacy_register_led(struct b43legacy_wldev *dev,
led->dev = dev;
led->index = led_index;
led->activelow = activelow;
- strncpy(led->name, name, sizeof(led->name));
+ strlcpy(led->name, name, sizeof(led->name));

led->led_dev.name = led->name;
led->led_dev.default_trigger = default_trigger;
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index ddd441b1516a..e10b0d20c4a7 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -316,6 +316,14 @@ static bool nvme_dbbuf_update_and_check_event(u16 value, u32 *dbbuf_db,
old_value = *dbbuf_db;
*dbbuf_db = value;

+ /*
+ * Ensure that the doorbell is updated before reading the event
+ * index from memory. The controller needs to provide similar
+ * ordering to ensure the envent index is updated before reading
+ * the doorbell.
+ */
+ mb();
+
if (!nvme_dbbuf_need_event(*dbbuf_ei, value, old_value))
return false;
}
diff --git a/drivers/pinctrl/freescale/pinctrl-imx1-core.c b/drivers/pinctrl/freescale/pinctrl-imx1-core.c
index c3bdd90b1422..deb7870b3d1a 100644
--- a/drivers/pinctrl/freescale/pinctrl-imx1-core.c
+++ b/drivers/pinctrl/freescale/pinctrl-imx1-core.c
@@ -429,7 +429,7 @@ static void imx1_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
const char *name;
int i, ret;

- if (group > info->ngroups)
+ if (group >= info->ngroups)
return;

seq_puts(s, "\n");
diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
index 45b7cb01f410..307403decf76 100644
--- a/drivers/platform/x86/ideapad-laptop.c
+++ b/drivers/platform/x86/ideapad-laptop.c
@@ -1133,10 +1133,10 @@ static const struct dmi_system_id no_hw_rfkill_list[] = {
},
},
{
- .ident = "Lenovo Legion Y520-15IKBN",
+ .ident = "Lenovo Legion Y520-15IKB",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
- DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y520-15IKBN"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y520-15IKB"),
},
},
{
diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index 8e3d0146ff8c..04791ea5d97b 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -895,7 +895,6 @@ static int wmi_dev_probe(struct device *dev)
struct wmi_driver *wdriver =
container_of(dev->driver, struct wmi_driver, driver);
int ret = 0;
- int count;
char *buf;

if (ACPI_FAILURE(wmi_method_enable(wblock, 1)))
@@ -917,9 +916,8 @@ static int wmi_dev_probe(struct device *dev)
goto probe_failure;
}

- count = get_order(wblock->req_buf_size);
- wblock->handler_data = (void *)__get_free_pages(GFP_KERNEL,
- count);
+ wblock->handler_data = kmalloc(wblock->req_buf_size,
+ GFP_KERNEL);
if (!wblock->handler_data) {
ret = -ENOMEM;
goto probe_failure;
@@ -964,8 +962,7 @@ static int wmi_dev_remove(struct device *dev)
if (wdriver->filter_callback) {
misc_deregister(&wblock->char_dev);
kfree(wblock->char_dev.name);
- free_pages((unsigned long)wblock->handler_data,
- get_order(wblock->req_buf_size));
+ kfree(wblock->handler_data);
}

if (wdriver->remove)
diff --git a/drivers/power/supply/generic-adc-battery.c b/drivers/power/supply/generic-adc-battery.c
index 28dc056eaafa..bc462d1ec963 100644
--- a/drivers/power/supply/generic-adc-battery.c
+++ b/drivers/power/supply/generic-adc-battery.c
@@ -241,10 +241,10 @@ static int gab_probe(struct platform_device *pdev)
struct power_supply_desc *psy_desc;
struct power_supply_config psy_cfg = {};
struct gab_platform_data *pdata = pdev->dev.platform_data;
- enum power_supply_property *properties;
int ret = 0;
int chan;
- int index = 0;
+ int index = ARRAY_SIZE(gab_props);
+ bool any = false;

adc_bat = devm_kzalloc(&pdev->dev, sizeof(*adc_bat), GFP_KERNEL);
if (!adc_bat) {
@@ -278,8 +278,6 @@ static int gab_probe(struct platform_device *pdev)
}

memcpy(psy_desc->properties, gab_props, sizeof(gab_props));
- properties = (enum power_supply_property *)
- ((char *)psy_desc->properties + sizeof(gab_props));

/*
* getting channel from iio and copying the battery properties
@@ -293,15 +291,22 @@ static int gab_probe(struct platform_device *pdev)
adc_bat->channel[chan] = NULL;
} else {
/* copying properties for supported channels only */
- memcpy(properties + sizeof(*(psy_desc->properties)) * index,
- &gab_dyn_props[chan],
- sizeof(gab_dyn_props[chan]));
- index++;
+ int index2;
+
+ for (index2 = 0; index2 < index; index2++) {
+ if (psy_desc->properties[index2] ==
+ gab_dyn_props[chan])
+ break; /* already known */
+ }
+ if (index2 == index) /* really new */
+ psy_desc->properties[index++] =
+ gab_dyn_props[chan];
+ any = true;
}
}

/* none of the channels are supported so let's bail out */
- if (index == 0) {
+ if (!any) {
ret = -ENODEV;
goto second_mem_fail;
}
@@ -312,7 +317,7 @@ static int gab_probe(struct platform_device *pdev)
* as come channels may be not be supported by the device.So
* we need to take care of that.
*/
- psy_desc->num_properties = ARRAY_SIZE(gab_props) + index;
+ psy_desc->num_properties = index;

adc_bat->psy = power_supply_register(&pdev->dev, psy_desc, &psy_cfg);
if (IS_ERR(adc_bat->psy)) {
diff --git a/drivers/regulator/arizona-ldo1.c b/drivers/regulator/arizona-ldo1.c
index f6d6a4ad9e8a..e976d073f28d 100644
--- a/drivers/regulator/arizona-ldo1.c
+++ b/drivers/regulator/arizona-ldo1.c
@@ -36,6 +36,8 @@ struct arizona_ldo1 {

struct regulator_consumer_supply supply;
struct regulator_init_data init_data;
+
+ struct gpio_desc *ena_gpiod;
};

static int arizona_ldo1_hc_list_voltage(struct regulator_dev *rdev,
@@ -253,12 +255,17 @@ static int arizona_ldo1_common_init(struct platform_device *pdev,
}
}

- /* We assume that high output = regulator off */
- config.ena_gpiod = devm_gpiod_get_optional(&pdev->dev, "wlf,ldoena",
- GPIOD_OUT_HIGH);
+ /* We assume that high output = regulator off
+ * Don't use devm, since we need to get against the parent device
+ * so clean up would happen at the wrong time
+ */
+ config.ena_gpiod = gpiod_get_optional(parent_dev, "wlf,ldoena",
+ GPIOD_OUT_LOW);
if (IS_ERR(config.ena_gpiod))
return PTR_ERR(config.ena_gpiod);

+ ldo1->ena_gpiod = config.ena_gpiod;
+
if (pdata->init_data)
config.init_data = pdata->init_data;
else
@@ -276,6 +283,9 @@ static int arizona_ldo1_common_init(struct platform_device *pdev,
of_node_put(config.of_node);

if (IS_ERR(ldo1->regulator)) {
+ if (config.ena_gpiod)
+ gpiod_put(config.ena_gpiod);
+
ret = PTR_ERR(ldo1->regulator);
dev_err(&pdev->dev, "Failed to register LDO1 supply: %d\n",
ret);
@@ -334,8 +344,19 @@ static int arizona_ldo1_probe(struct platform_device *pdev)
return ret;
}

+static int arizona_ldo1_remove(struct platform_device *pdev)
+{
+ struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev);
+
+ if (ldo1->ena_gpiod)
+ gpiod_put(ldo1->ena_gpiod);
+
+ return 0;
+}
+
static struct platform_driver arizona_ldo1_driver = {
.probe = arizona_ldo1_probe,
+ .remove = arizona_ldo1_remove,
.driver = {
.name = "arizona-ldo1",
},
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index f4ca72dd862f..9c7d9da42ba0 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -631,21 +631,20 @@ static inline unsigned long qdio_aob_for_buffer(struct qdio_output_q *q,
unsigned long phys_aob = 0;

if (!q->use_cq)
- goto out;
+ return 0;

if (!q->aobs[bufnr]) {
struct qaob *aob = qdio_allocate_aob();
q->aobs[bufnr] = aob;
}
if (q->aobs[bufnr]) {
- q->sbal_state[bufnr].flags = QDIO_OUTBUF_STATE_FLAG_NONE;
q->sbal_state[bufnr].aob = q->aobs[bufnr];
q->aobs[bufnr]->user1 = (u64) q->sbal_state[bufnr].user;
phys_aob = virt_to_phys(q->aobs[bufnr]);
WARN_ON_ONCE(phys_aob & 0xFF);
}

-out:
+ q->sbal_state[bufnr].flags = 0;
return phys_aob;
}

diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index ff1d612f6fb9..41cdda7a926b 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -557,34 +557,46 @@ int sas_ata_init(struct domain_device *found_dev)
{
struct sas_ha_struct *ha = found_dev->port->ha;
struct Scsi_Host *shost = ha->core.shost;
+ struct ata_host *ata_host;
struct ata_port *ap;
int rc;

- ata_host_init(&found_dev->sata_dev.ata_host, ha->dev, &sas_sata_ops);
- ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host,
- &sata_port_info,
- shost);
+ ata_host = kzalloc(sizeof(*ata_host), GFP_KERNEL);
+ if (!ata_host) {
+ SAS_DPRINTK("ata host alloc failed.\n");
+ return -ENOMEM;
+ }
+
+ ata_host_init(ata_host, ha->dev, &sas_sata_ops);
+
+ ap = ata_sas_port_alloc(ata_host, &sata_port_info, shost);
if (!ap) {
SAS_DPRINTK("ata_sas_port_alloc failed.\n");
- return -ENODEV;
+ rc = -ENODEV;
+ goto free_host;
}

ap->private_data = found_dev;
ap->cbl = ATA_CBL_SATA;
ap->scsi_host = shost;
rc = ata_sas_port_init(ap);
- if (rc) {
- ata_sas_port_destroy(ap);
- return rc;
- }
- rc = ata_sas_tport_add(found_dev->sata_dev.ata_host.dev, ap);
- if (rc) {
- ata_sas_port_destroy(ap);
- return rc;
- }
+ if (rc)
+ goto destroy_port;
+
+ rc = ata_sas_tport_add(ata_host->dev, ap);
+ if (rc)
+ goto destroy_port;
+
+ found_dev->sata_dev.ata_host = ata_host;
found_dev->sata_dev.ap = ap;

return 0;
+
+destroy_port:
+ ata_sas_port_destroy(ap);
+free_host:
+ ata_host_put(ata_host);
+ return rc;
}

void sas_ata_task_abort(struct sas_task *task)
diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c
index 1ffca28fe6a8..0148ae62a52a 100644
--- a/drivers/scsi/libsas/sas_discover.c
+++ b/drivers/scsi/libsas/sas_discover.c
@@ -316,6 +316,8 @@ void sas_free_device(struct kref *kref)
if (dev_is_sata(dev) && dev->sata_dev.ap) {
ata_sas_tport_delete(dev->sata_dev.ap);
ata_sas_port_destroy(dev->sata_dev.ap);
+ ata_host_put(dev->sata_dev.ata_host);
+ dev->sata_dev.ata_host = NULL;
dev->sata_dev.ap = NULL;
}

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index e44c91edf92d..3c8c17c0b547 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -3284,6 +3284,7 @@ void mpt3sas_base_clear_st(struct MPT3SAS_ADAPTER *ioc,
st->cb_idx = 0xFF;
st->direct_io = 0;
atomic_set(&ioc->chain_lookup[st->smid - 1].chain_offset, 0);
+ st->smid = 0;
}

/**
diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index b8d131a455d0..f3d727076e1f 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -1489,7 +1489,7 @@ mpt3sas_scsih_scsi_lookup_get(struct MPT3SAS_ADAPTER *ioc, u16 smid)
scmd = scsi_host_find_tag(ioc->shost, unique_tag);
if (scmd) {
st = scsi_cmd_priv(scmd);
- if (st->cb_idx == 0xFF)
+ if (st->cb_idx == 0xFF || st->smid == 0)
scmd = NULL;
}
}
diff --git a/drivers/scsi/mpt3sas/mpt3sas_transport.c b/drivers/scsi/mpt3sas/mpt3sas_transport.c
index 3a143bb5ca72..6c71b20af9e3 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_transport.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_transport.c
@@ -1936,12 +1936,12 @@ _transport_smp_handler(struct bsg_job *job, struct Scsi_Host *shost,
pr_info(MPT3SAS_FMT "%s: host reset in progress!\n",
__func__, ioc->name);
rc = -EFAULT;
- goto out;
+ goto job_done;
}

rc = mutex_lock_interruptible(&ioc->transport_cmds.mutex);
if (rc)
- goto out;
+ goto job_done;

if (ioc->transport_cmds.status != MPT3_CMD_NOT_USED) {
pr_err(MPT3SAS_FMT "%s: transport_cmds in use\n", ioc->name,
@@ -2066,6 +2066,7 @@ _transport_smp_handler(struct bsg_job *job, struct Scsi_Host *shost,
out:
ioc->transport_cmds.status = MPT3_CMD_NOT_USED;
mutex_unlock(&ioc->transport_cmds.mutex);
+job_done:
bsg_job_done(job, rc, reslen);
}

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 1b19b954bbae..ec550ee0108e 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -382,7 +382,7 @@ qla2x00_async_adisc_sp_done(void *ptr, int res)
"Async done-%s res %x %8phC\n",
sp->name, res, sp->fcport->port_name);

- sp->fcport->flags &= ~FCF_ASYNC_SENT;
+ sp->fcport->flags &= ~(FCF_ASYNC_SENT | FCF_ASYNC_ACTIVE);

memset(&ea, 0, sizeof(ea));
ea.event = FCME_ADISC_DONE;
diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c
index dd93a22fe843..667055cbe155 100644
--- a/drivers/scsi/qla2xxx/qla_iocb.c
+++ b/drivers/scsi/qla2xxx/qla_iocb.c
@@ -2656,6 +2656,7 @@ qla24xx_els_dcmd2_iocb(scsi_qla_host_t *vha, int els_opcode,
ql_dbg(ql_dbg_io, vha, 0x3073,
"Enter: PLOGI portid=%06x\n", fcport->d_id.b24);

+ fcport->flags |= FCF_ASYNC_SENT;
sp->type = SRB_ELS_DCMD;
sp->name = "ELS_DCMD";
sp->fcport = fcport;
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 7943b762c12d..87ef6714845b 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -722,8 +722,24 @@ static ssize_t
sdev_store_delete(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- if (device_remove_file_self(dev, attr))
- scsi_remove_device(to_scsi_device(dev));
+ struct kernfs_node *kn;
+
+ kn = sysfs_break_active_protection(&dev->kobj, &attr->attr);
+ WARN_ON_ONCE(!kn);
+ /*
+ * Concurrent writes into the "delete" sysfs attribute may trigger
+ * concurrent calls to device_remove_file() and scsi_remove_device().
+ * device_remove_file() handles concurrent removal calls by
+ * serializing these and by ignoring the second and later removal
+ * attempts. Concurrent calls of scsi_remove_device() are
+ * serialized. The second and later calls of scsi_remove_device() are
+ * ignored because the first call of that function changes the device
+ * state into SDEV_DEL.
+ */
+ device_remove_file(dev, attr);
+ scsi_remove_device(to_scsi_device(dev));
+ if (kn)
+ sysfs_unbreak_active_protection(kn);
return count;
};
static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
diff --git a/drivers/soc/qcom/rmtfs_mem.c b/drivers/soc/qcom/rmtfs_mem.c
index c8999e38b005..8a3678c2e83c 100644
--- a/drivers/soc/qcom/rmtfs_mem.c
+++ b/drivers/soc/qcom/rmtfs_mem.c
@@ -184,6 +184,7 @@ static int qcom_rmtfs_mem_probe(struct platform_device *pdev)
device_initialize(&rmtfs_mem->dev);
rmtfs_mem->dev.parent = &pdev->dev;
rmtfs_mem->dev.groups = qcom_rmtfs_mem_groups;
+ rmtfs_mem->dev.release = qcom_rmtfs_mem_release_device;

rmtfs_mem->base = devm_memremap(&rmtfs_mem->dev, rmtfs_mem->addr,
rmtfs_mem->size, MEMREMAP_WC);
@@ -206,8 +207,6 @@ static int qcom_rmtfs_mem_probe(struct platform_device *pdev)
goto put_device;
}

- rmtfs_mem->dev.release = qcom_rmtfs_mem_release_device;
-
ret = of_property_read_u32(node, "qcom,vmid", &vmid);
if (ret < 0 && ret != -EINVAL) {
dev_err(&pdev->dev, "failed to parse qcom,vmid\n");
diff --git a/drivers/target/iscsi/iscsi_target_login.c b/drivers/target/iscsi/iscsi_target_login.c
index 99501785cdc1..68b3eb00a9d0 100644
--- a/drivers/target/iscsi/iscsi_target_login.c
+++ b/drivers/target/iscsi/iscsi_target_login.c
@@ -348,8 +348,7 @@ static int iscsi_login_zero_tsih_s1(
pr_err("idr_alloc() for sess_idr failed\n");
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
ISCSI_LOGIN_STATUS_NO_RESOURCES);
- kfree(sess);
- return -ENOMEM;
+ goto free_sess;
}

sess->creation_time = get_jiffies_64();
@@ -365,20 +364,28 @@ static int iscsi_login_zero_tsih_s1(
ISCSI_LOGIN_STATUS_NO_RESOURCES);
pr_err("Unable to allocate memory for"
" struct iscsi_sess_ops.\n");
- kfree(sess);
- return -ENOMEM;
+ goto remove_idr;
}

sess->se_sess = transport_init_session(TARGET_PROT_NORMAL);
if (IS_ERR(sess->se_sess)) {
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
ISCSI_LOGIN_STATUS_NO_RESOURCES);
- kfree(sess->sess_ops);
- kfree(sess);
- return -ENOMEM;
+ goto free_ops;
}

return 0;
+
+free_ops:
+ kfree(sess->sess_ops);
+remove_idr:
+ spin_lock_bh(&sess_idr_lock);
+ idr_remove(&sess_idr, sess->session_index);
+ spin_unlock_bh(&sess_idr_lock);
+free_sess:
+ kfree(sess);
+ conn->sess = NULL;
+ return -ENOMEM;
}

static int iscsi_login_zero_tsih_s2(
@@ -1161,13 +1168,13 @@ void iscsi_target_login_sess_out(struct iscsi_conn *conn,
ISCSI_LOGIN_STATUS_INIT_ERR);
if (!zero_tsih || !conn->sess)
goto old_sess_out;
- if (conn->sess->se_sess)
- transport_free_session(conn->sess->se_sess);
- if (conn->sess->session_index != 0) {
- spin_lock_bh(&sess_idr_lock);
- idr_remove(&sess_idr, conn->sess->session_index);
- spin_unlock_bh(&sess_idr_lock);
- }
+
+ transport_free_session(conn->sess->se_sess);
+
+ spin_lock_bh(&sess_idr_lock);
+ idr_remove(&sess_idr, conn->sess->session_index);
+ spin_unlock_bh(&sess_idr_lock);
+
kfree(conn->sess->sess_ops);
kfree(conn->sess);
conn->sess = NULL;
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 205092dc9390..dfed08e70ec1 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -961,8 +961,9 @@ static int btree_writepages(struct address_space *mapping,

fs_info = BTRFS_I(mapping->host)->root->fs_info;
/* this is a bit racy, but that's ok */
- ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes,
- BTRFS_DIRTY_METADATA_THRESH);
+ ret = __percpu_counter_compare(&fs_info->dirty_metadata_bytes,
+ BTRFS_DIRTY_METADATA_THRESH,
+ fs_info->dirty_metadata_batch);
if (ret < 0)
return 0;
}
@@ -4150,8 +4151,9 @@ static void __btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info,
if (flush_delayed)
btrfs_balance_delayed_items(fs_info);

- ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes,
- BTRFS_DIRTY_METADATA_THRESH);
+ ret = __percpu_counter_compare(&fs_info->dirty_metadata_bytes,
+ BTRFS_DIRTY_METADATA_THRESH,
+ fs_info->dirty_metadata_batch);
if (ret > 0) {
balance_dirty_pages_ratelimited(fs_info->btree_inode->i_mapping);
}
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 3d9fe58c0080..8aab7a6c1e58 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -4358,7 +4358,7 @@ int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes)
data_sinfo->flags, bytes, 1);
spin_unlock(&data_sinfo->lock);

- return ret;
+ return 0;
}

int btrfs_check_data_free_space(struct inode *inode,
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index eba61bcb9bb3..071d949f69ec 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -6027,32 +6027,6 @@ static int btrfs_real_readdir(struct file *file, struct dir_context *ctx)
return ret;
}

-int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc)
-{
- struct btrfs_root *root = BTRFS_I(inode)->root;
- struct btrfs_trans_handle *trans;
- int ret = 0;
- bool nolock = false;
-
- if (test_bit(BTRFS_INODE_DUMMY, &BTRFS_I(inode)->runtime_flags))
- return 0;
-
- if (btrfs_fs_closing(root->fs_info) &&
- btrfs_is_free_space_inode(BTRFS_I(inode)))
- nolock = true;
-
- if (wbc->sync_mode == WB_SYNC_ALL) {
- if (nolock)
- trans = btrfs_join_transaction_nolock(root);
- else
- trans = btrfs_join_transaction(root);
- if (IS_ERR(trans))
- return PTR_ERR(trans);
- ret = btrfs_commit_transaction(trans);
- }
- return ret;
-}
-
/*
* This is somewhat expensive, updating the tree every time the
* inode changes. But, it is most likely to find the inode in cache.
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index c47f62b19226..b75b4abaa4a5 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -100,6 +100,7 @@ struct send_ctx {
u64 cur_inode_rdev;
u64 cur_inode_last_extent;
u64 cur_inode_next_write_offset;
+ bool ignore_cur_inode;

u64 send_progress;

@@ -5006,6 +5007,15 @@ static int send_hole(struct send_ctx *sctx, u64 end)
u64 len;
int ret = 0;

+ /*
+ * A hole that starts at EOF or beyond it. Since we do not yet support
+ * fallocate (for extent preallocation and hole punching), sending a
+ * write of zeroes starting at EOF or beyond would later require issuing
+ * a truncate operation which would undo the write and achieve nothing.
+ */
+ if (offset >= sctx->cur_inode_size)
+ return 0;
+
if (sctx->flags & BTRFS_SEND_FLAG_NO_FILE_DATA)
return send_update_extent(sctx, offset, end - offset);

@@ -5799,6 +5809,9 @@ static int finish_inode_if_needed(struct send_ctx *sctx, int at_end)
int pending_move = 0;
int refs_processed = 0;

+ if (sctx->ignore_cur_inode)
+ return 0;
+
ret = process_recorded_refs_if_needed(sctx, at_end, &pending_move,
&refs_processed);
if (ret < 0)
@@ -5917,6 +5930,93 @@ static int finish_inode_if_needed(struct send_ctx *sctx, int at_end)
return ret;
}

+struct parent_paths_ctx {
+ struct list_head *refs;
+ struct send_ctx *sctx;
+};
+
+static int record_parent_ref(int num, u64 dir, int index, struct fs_path *name,
+ void *ctx)
+{
+ struct parent_paths_ctx *ppctx = ctx;
+
+ return record_ref(ppctx->sctx->parent_root, dir, name, ppctx->sctx,
+ ppctx->refs);
+}
+
+/*
+ * Issue unlink operations for all paths of the current inode found in the
+ * parent snapshot.
+ */
+static int btrfs_unlink_all_paths(struct send_ctx *sctx)
+{
+ LIST_HEAD(deleted_refs);
+ struct btrfs_path *path;
+ struct btrfs_key key;
+ struct parent_paths_ctx ctx;
+ int ret;
+
+ path = alloc_path_for_send();
+ if (!path)
+ return -ENOMEM;
+
+ key.objectid = sctx->cur_ino;
+ key.type = BTRFS_INODE_REF_KEY;
+ key.offset = 0;
+ ret = btrfs_search_slot(NULL, sctx->parent_root, &key, path, 0, 0);
+ if (ret < 0)
+ goto out;
+
+ ctx.refs = &deleted_refs;
+ ctx.sctx = sctx;
+
+ while (true) {
+ struct extent_buffer *eb = path->nodes[0];
+ int slot = path->slots[0];
+
+ if (slot >= btrfs_header_nritems(eb)) {
+ ret = btrfs_next_leaf(sctx->parent_root, path);
+ if (ret < 0)
+ goto out;
+ else if (ret > 0)
+ break;
+ continue;
+ }
+
+ btrfs_item_key_to_cpu(eb, &key, slot);
+ if (key.objectid != sctx->cur_ino)
+ break;
+ if (key.type != BTRFS_INODE_REF_KEY &&
+ key.type != BTRFS_INODE_EXTREF_KEY)
+ break;
+
+ ret = iterate_inode_ref(sctx->parent_root, path, &key, 1,
+ record_parent_ref, &ctx);
+ if (ret < 0)
+ goto out;
+
+ path->slots[0]++;
+ }
+
+ while (!list_empty(&deleted_refs)) {
+ struct recorded_ref *ref;
+
+ ref = list_first_entry(&deleted_refs, struct recorded_ref, list);
+ ret = send_unlink(sctx, ref->full_path);
+ if (ret < 0)
+ goto out;
+ fs_path_free(ref->full_path);
+ list_del(&ref->list);
+ kfree(ref);
+ }
+ ret = 0;
+out:
+ btrfs_free_path(path);
+ if (ret)
+ __free_recorded_refs(&deleted_refs);
+ return ret;
+}
+
static int changed_inode(struct send_ctx *sctx,
enum btrfs_compare_tree_result result)
{
@@ -5931,6 +6031,7 @@ static int changed_inode(struct send_ctx *sctx,
sctx->cur_inode_new_gen = 0;
sctx->cur_inode_last_extent = (u64)-1;
sctx->cur_inode_next_write_offset = 0;
+ sctx->ignore_cur_inode = false;

/*
* Set send_progress to current inode. This will tell all get_cur_xxx
@@ -5971,6 +6072,33 @@ static int changed_inode(struct send_ctx *sctx,
sctx->cur_inode_new_gen = 1;
}

+ /*
+ * Normally we do not find inodes with a link count of zero (orphans)
+ * because the most common case is to create a snapshot and use it
+ * for a send operation. However other less common use cases involve
+ * using a subvolume and send it after turning it to RO mode just
+ * after deleting all hard links of a file while holding an open
+ * file descriptor against it or turning a RO snapshot into RW mode,
+ * keep an open file descriptor against a file, delete it and then
+ * turn the snapshot back to RO mode before using it for a send
+ * operation. So if we find such cases, ignore the inode and all its
+ * items completely if it's a new inode, or if it's a changed inode
+ * make sure all its previous paths (from the parent snapshot) are all
+ * unlinked and all other the inode items are ignored.
+ */
+ if (result == BTRFS_COMPARE_TREE_NEW ||
+ result == BTRFS_COMPARE_TREE_CHANGED) {
+ u32 nlinks;
+
+ nlinks = btrfs_inode_nlink(sctx->left_path->nodes[0], left_ii);
+ if (nlinks == 0) {
+ sctx->ignore_cur_inode = true;
+ if (result == BTRFS_COMPARE_TREE_CHANGED)
+ ret = btrfs_unlink_all_paths(sctx);
+ goto out;
+ }
+ }
+
if (result == BTRFS_COMPARE_TREE_NEW) {
sctx->cur_inode_gen = left_gen;
sctx->cur_inode_new = 1;
@@ -6309,15 +6437,17 @@ static int changed_cb(struct btrfs_path *left_path,
key->objectid == BTRFS_FREE_SPACE_OBJECTID)
goto out;

- if (key->type == BTRFS_INODE_ITEM_KEY)
+ if (key->type == BTRFS_INODE_ITEM_KEY) {
ret = changed_inode(sctx, result);
- else if (key->type == BTRFS_INODE_REF_KEY ||
- key->type == BTRFS_INODE_EXTREF_KEY)
- ret = changed_ref(sctx, result);
- else if (key->type == BTRFS_XATTR_ITEM_KEY)
- ret = changed_xattr(sctx, result);
- else if (key->type == BTRFS_EXTENT_DATA_KEY)
- ret = changed_extent(sctx, result);
+ } else if (!sctx->ignore_cur_inode) {
+ if (key->type == BTRFS_INODE_REF_KEY ||
+ key->type == BTRFS_INODE_EXTREF_KEY)
+ ret = changed_ref(sctx, result);
+ else if (key->type == BTRFS_XATTR_ITEM_KEY)
+ ret = changed_xattr(sctx, result);
+ else if (key->type == BTRFS_EXTENT_DATA_KEY)
+ ret = changed_extent(sctx, result);
+ }

out:
return ret;
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 81107ad49f3a..bddfc28b27c0 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -2331,7 +2331,6 @@ static const struct super_operations btrfs_super_ops = {
.sync_fs = btrfs_sync_fs,
.show_options = btrfs_show_options,
.show_devname = btrfs_show_devname,
- .write_inode = btrfs_write_inode,
.alloc_inode = btrfs_alloc_inode,
.destroy_inode = btrfs_destroy_inode,
.statfs = btrfs_statfs,
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index f8220ec02036..84b00a29d531 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -1291,6 +1291,46 @@ static int unlink_old_inode_refs(struct btrfs_trans_handle *trans,
return ret;
}

+static int btrfs_inode_ref_exists(struct inode *inode, struct inode *dir,
+ const u8 ref_type, const char *name,
+ const int namelen)
+{
+ struct btrfs_key key;
+ struct btrfs_path *path;
+ const u64 parent_id = btrfs_ino(BTRFS_I(dir));
+ int ret;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ key.objectid = btrfs_ino(BTRFS_I(inode));
+ key.type = ref_type;
+ if (key.type == BTRFS_INODE_REF_KEY)
+ key.offset = parent_id;
+ else
+ key.offset = btrfs_extref_hash(parent_id, name, namelen);
+
+ ret = btrfs_search_slot(NULL, BTRFS_I(inode)->root, &key, path, 0, 0);
+ if (ret < 0)
+ goto out;
+ if (ret > 0) {
+ ret = 0;
+ goto out;
+ }
+ if (key.type == BTRFS_INODE_EXTREF_KEY)
+ ret = btrfs_find_name_in_ext_backref(path->nodes[0],
+ path->slots[0], parent_id,
+ name, namelen, NULL);
+ else
+ ret = btrfs_find_name_in_backref(path->nodes[0], path->slots[0],
+ name, namelen, NULL);
+
+out:
+ btrfs_free_path(path);
+ return ret;
+}
+
/*
* replay one inode back reference item found in the log tree.
* eb, slot and key refer to the buffer and key found in the log tree.
@@ -1400,6 +1440,32 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans,
}
}

+ /*
+ * If a reference item already exists for this inode
+ * with the same parent and name, but different index,
+ * drop it and the corresponding directory index entries
+ * from the parent before adding the new reference item
+ * and dir index entries, otherwise we would fail with
+ * -EEXIST returned from btrfs_add_link() below.
+ */
+ ret = btrfs_inode_ref_exists(inode, dir, key->type,
+ name, namelen);
+ if (ret > 0) {
+ ret = btrfs_unlink_inode(trans, root,
+ BTRFS_I(dir),
+ BTRFS_I(inode),
+ name, namelen);
+ /*
+ * If we dropped the link count to 0, bump it so
+ * that later the iput() on the inode will not
+ * free it. We will fixup the link count later.
+ */
+ if (!ret && inode->i_nlink == 0)
+ inc_nlink(inode);
+ }
+ if (ret < 0)
+ goto out;
+
/* insert our name */
ret = btrfs_add_link(trans, BTRFS_I(dir),
BTRFS_I(inode),
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index bfe999505815..991bfb271908 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -160,25 +160,41 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
seq_printf(m, "Features:");
#ifdef CONFIG_CIFS_DFS_UPCALL
- seq_printf(m, " dfs");
+ seq_printf(m, " DFS");
#endif
#ifdef CONFIG_CIFS_FSCACHE
- seq_printf(m, " fscache");
+ seq_printf(m, ",FSCACHE");
+#endif
+#ifdef CONFIG_CIFS_SMB_DIRECT
+ seq_printf(m, ",SMB_DIRECT");
+#endif
+#ifdef CONFIG_CIFS_STATS2
+ seq_printf(m, ",STATS2");
+#elif defined(CONFIG_CIFS_STATS)
+ seq_printf(m, ",STATS");
+#endif
+#ifdef CONFIG_CIFS_DEBUG2
+ seq_printf(m, ",DEBUG2");
+#elif defined(CONFIG_CIFS_DEBUG)
+ seq_printf(m, ",DEBUG");
+#endif
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+ seq_printf(m, ",ALLOW_INSECURE_LEGACY");
#endif
#ifdef CONFIG_CIFS_WEAK_PW_HASH
- seq_printf(m, " lanman");
+ seq_printf(m, ",WEAK_PW_HASH");
#endif
#ifdef CONFIG_CIFS_POSIX
- seq_printf(m, " posix");
+ seq_printf(m, ",CIFS_POSIX");
#endif
#ifdef CONFIG_CIFS_UPCALL
- seq_printf(m, " spnego");
+ seq_printf(m, ",UPCALL(SPNEGO)");
#endif
#ifdef CONFIG_CIFS_XATTR
- seq_printf(m, " xattr");
+ seq_printf(m, ",XATTR");
#endif
#ifdef CONFIG_CIFS_ACL
- seq_printf(m, " acl");
+ seq_printf(m, ",ACL");
#endif
seq_putc(m, '\n');
seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index d5aa7ae917bf..69ec5427769c 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -209,14 +209,16 @@ cifs_statfs(struct dentry *dentry, struct kstatfs *buf)

xid = get_xid();

- /*
- * PATH_MAX may be too long - it would presumably be total path,
- * but note that some servers (includinng Samba 3) have a shorter
- * maximum path.
- *
- * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
- */
- buf->f_namelen = PATH_MAX;
+ if (le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength) > 0)
+ buf->f_namelen =
+ le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength);
+ else
+ buf->f_namelen = PATH_MAX;
+
+ buf->f_fsid.val[0] = tcon->vol_serial_number;
+ /* are using part of create time for more randomness, see man statfs */
+ buf->f_fsid.val[1] = (int)le64_to_cpu(tcon->vol_create_time);
+
buf->f_files = 0; /* undefined */
buf->f_ffree = 0; /* unlimited */

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index c923c7854027..4b45d3ef3f9d 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -913,6 +913,7 @@ cap_unix(struct cifs_ses *ses)

struct cached_fid {
bool is_valid:1; /* Do we have a useable root fid */
+ struct kref refcount;
struct cifs_fid *fid;
struct mutex fid_mutex;
struct cifs_tcon *tcon;
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index a2cfb33e85c1..9051b9dfd590 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1122,6 +1122,8 @@ cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid,
if (!server->ops->set_file_info)
return -ENOSYS;

+ info_buf.Pad = 0;
+
if (attrs->ia_valid & ATTR_ATIME) {
set_time = true;
info_buf.LastAccessTime =
diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index de41f96aba49..2148b0f60e5e 100644
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -396,7 +396,7 @@ smb3_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
struct cifs_io_parms io_parms;
int buf_type = CIFS_NO_BUFFER;
__le16 *utf16_path;
- __u8 oplock = SMB2_OPLOCK_LEVEL_II;
+ __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct smb2_file_all_info *pfile_info = NULL;

oparms.tcon = tcon;
@@ -459,7 +459,7 @@ smb3_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
struct cifs_io_parms io_parms;
int create_options = CREATE_NOT_DIR;
__le16 *utf16_path;
- __u8 oplock = SMB2_OPLOCK_LEVEL_EXCLUSIVE;
+ __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct kvec iov[2];

if (backup_cred(cifs_sb))
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index 8b0502cd39af..aa23c00367ec 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -398,6 +398,12 @@ int build_ntlmssp_auth_blob(unsigned char **pbuffer,
goto setup_ntlmv2_ret;
}
*pbuffer = kmalloc(size_of_ntlmssp_blob(ses), GFP_KERNEL);
+ if (!*pbuffer) {
+ rc = -ENOMEM;
+ cifs_dbg(VFS, "Error %d during NTLMSSP allocation\n", rc);
+ *buflen = 0;
+ goto setup_ntlmv2_ret;
+ }
sec_blob = (AUTHENTICATE_MESSAGE *)*pbuffer;

memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c
index d01ad706d7fc..1eef1791d0c4 100644
--- a/fs/cifs/smb2inode.c
+++ b/fs/cifs/smb2inode.c
@@ -120,7 +120,9 @@ smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
break;
}

- if (use_cached_root_handle == false)
+ if (use_cached_root_handle)
+ close_shroot(&tcon->crfid);
+ else
rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
if (tmprc)
rc = tmprc;
@@ -281,7 +283,7 @@ smb2_set_file_info(struct inode *inode, const char *full_path,
int rc;

if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
- (buf->LastWriteTime == 0) && (buf->ChangeTime) &&
+ (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
(buf->Attributes == 0))
return 0; /* would be a no op, no sense sending this */

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index ea92a38b2f08..ee6c4a952ce9 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -466,21 +466,36 @@ SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
return rc;
}

-void
-smb2_cached_lease_break(struct work_struct *work)
+static void
+smb2_close_cached_fid(struct kref *ref)
{
- struct cached_fid *cfid = container_of(work,
- struct cached_fid, lease_break);
- mutex_lock(&cfid->fid_mutex);
+ struct cached_fid *cfid = container_of(ref, struct cached_fid,
+ refcount);
+
if (cfid->is_valid) {
cifs_dbg(FYI, "clear cached root file handle\n");
SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
cfid->fid->volatile_fid);
cfid->is_valid = false;
}
+}
+
+void close_shroot(struct cached_fid *cfid)
+{
+ mutex_lock(&cfid->fid_mutex);
+ kref_put(&cfid->refcount, smb2_close_cached_fid);
mutex_unlock(&cfid->fid_mutex);
}

+void
+smb2_cached_lease_break(struct work_struct *work)
+{
+ struct cached_fid *cfid = container_of(work,
+ struct cached_fid, lease_break);
+
+ close_shroot(cfid);
+}
+
/*
* Open the directory at the root of a share
*/
@@ -495,6 +510,7 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
if (tcon->crfid.is_valid) {
cifs_dbg(FYI, "found a cached root file handle\n");
memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
+ kref_get(&tcon->crfid.refcount);
mutex_unlock(&tcon->crfid.fid_mutex);
return 0;
}
@@ -511,6 +527,8 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
tcon->crfid.tcon = tcon;
tcon->crfid.is_valid = true;
+ kref_init(&tcon->crfid.refcount);
+ kref_get(&tcon->crfid.refcount);
}
mutex_unlock(&tcon->crfid.fid_mutex);
return rc;
@@ -548,10 +566,15 @@ smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
FS_ATTRIBUTE_INFORMATION);
SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
FS_DEVICE_INFORMATION);
+ SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
+ FS_VOLUME_INFORMATION);
SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
if (no_cached_open)
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+ else
+ close_shroot(&tcon->crfid);
+
return;
}

@@ -1353,6 +1376,13 @@ smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,

}

+/* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
+#define GMT_TOKEN_SIZE 50
+
+/*
+ * Input buffer contains (empty) struct smb_snapshot array with size filled in
+ * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
+ */
static int
smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
struct cifsFileInfo *cfile, void __user *ioc_buf)
@@ -1382,14 +1412,27 @@ smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
kfree(retbuf);
return rc;
}
- if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
- rc = -ERANGE;
- kfree(retbuf);
- return rc;
- }

- if (ret_data_len > snapshot_in.snapshot_array_size)
- ret_data_len = snapshot_in.snapshot_array_size;
+ /*
+ * Check for min size, ie not large enough to fit even one GMT
+ * token (snapshot). On the first ioctl some users may pass in
+ * smaller size (or zero) to simply get the size of the array
+ * so the user space caller can allocate sufficient memory
+ * and retry the ioctl again with larger array size sufficient
+ * to hold all of the snapshot GMT tokens on the second try.
+ */
+ if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
+ ret_data_len = sizeof(struct smb_snapshot_array);
+
+ /*
+ * We return struct SRV_SNAPSHOT_ARRAY, followed by
+ * the snapshot array (of 50 byte GMT tokens) each
+ * representing an available previous version of the data
+ */
+ if (ret_data_len > (snapshot_in.snapshot_array_size +
+ sizeof(struct smb_snapshot_array)))
+ ret_data_len = snapshot_in.snapshot_array_size +
+ sizeof(struct smb_snapshot_array);

if (copy_to_user(ioc_buf, retbuf, ret_data_len))
rc = -EFAULT;
@@ -3366,6 +3409,11 @@ struct smb_version_operations smb311_operations = {
.query_all_EAs = smb2_query_eas,
.set_EA = smb2_set_ea,
#endif /* CIFS_XATTR */
+#ifdef CONFIG_CIFS_ACL
+ .get_acl = get_smb2_acl,
+ .get_acl_by_fid = get_smb2_acl_by_fid,
+ .set_acl = set_smb2_acl,
+#endif /* CIFS_ACL */
.next_header = smb2_next_header,
};
#endif /* CIFS_SMB311 */
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 3c92678cb45b..ffce77e00a58 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -4046,6 +4046,9 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
} else if (level == FS_SECTOR_SIZE_INFORMATION) {
max_len = sizeof(struct smb3_fs_ss_info);
min_len = sizeof(struct smb3_fs_ss_info);
+ } else if (level == FS_VOLUME_INFORMATION) {
+ max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN;
+ min_len = sizeof(struct smb3_fs_vol_info);
} else {
cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
return -EINVAL;
@@ -4090,6 +4093,11 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
tcon->ss_flags = le32_to_cpu(ss_info->Flags);
tcon->perf_sector_size =
le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
+ } else if (level == FS_VOLUME_INFORMATION) {
+ struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *)
+ (offset + (char *)rsp);
+ tcon->vol_serial_number = vol_info->VolumeSerialNumber;
+ tcon->vol_create_time = vol_info->VolumeCreationTime;
}

qfsattr_exit:
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index a671adcc44a6..c2a4526512b5 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -1248,6 +1248,17 @@ struct smb3_fs_ss_info {
__le32 ByteOffsetForPartitionAlignment;
} __packed;

+/* volume info struct - see MS-FSCC 2.5.9 */
+#define MAX_VOL_LABEL_LEN 32
+struct smb3_fs_vol_info {
+ __le64 VolumeCreationTime;
+ __u32 VolumeSerialNumber;
+ __le32 VolumeLabelLength; /* includes trailing null */
+ __u8 SupportsObjects; /* True if eg like NTFS, supports objects */
+ __u8 Reserved;
+ __u8 VolumeLabel[0]; /* variable len */
+} __packed;
+
/* partial list of QUERY INFO levels */
#define FILE_DIRECTORY_INFORMATION 1
#define FILE_FULL_DIRECTORY_INFORMATION 2
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index 6e6a4f2ec890..c1520b48d1e1 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -68,6 +68,7 @@ extern int smb3_handle_read_data(struct TCP_Server_Info *server,

extern int open_shroot(unsigned int xid, struct cifs_tcon *tcon,
struct cifs_fid *pfid);
+extern void close_shroot(struct cached_fid *cfid);
extern void move_smb2_info_to_cifs(FILE_ALL_INFO *dst,
struct smb2_file_all_info *src);
extern int smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c
index 719d55e63d88..bf61c3774830 100644
--- a/fs/cifs/smb2transport.c
+++ b/fs/cifs/smb2transport.c
@@ -173,7 +173,7 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
struct kvec *iov = rqst->rq_iov;
struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)iov[0].iov_base;
struct cifs_ses *ses;
- struct shash_desc *shash = &server->secmech.sdeschmacsha256->shash;
+ struct shash_desc *shash;
struct smb_rqst drqst;

ses = smb2_find_smb_ses(server, shdr->SessionId);
@@ -187,7 +187,7 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)

rc = smb2_crypto_shash_allocate(server);
if (rc) {
- cifs_dbg(VFS, "%s: shah256 alloc failed\n", __func__);
+ cifs_dbg(VFS, "%s: sha256 alloc failed\n", __func__);
return rc;
}

@@ -198,6 +198,7 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
return rc;
}

+ shash = &server->secmech.sdeschmacsha256->shash;
rc = crypto_shash_init(shash);
if (rc) {
cifs_dbg(VFS, "%s: Could not init sha256", __func__);
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index aa52d87985aa..e5d6ee61ff48 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -426,9 +426,9 @@ ext4_read_block_bitmap_nowait(struct super_block *sb, ext4_group_t block_group)
}
bh = sb_getblk(sb, bitmap_blk);
if (unlikely(!bh)) {
- ext4_error(sb, "Cannot get buffer for block bitmap - "
- "block_group = %u, block_bitmap = %llu",
- block_group, bitmap_blk);
+ ext4_warning(sb, "Cannot get buffer for block bitmap - "
+ "block_group = %u, block_bitmap = %llu",
+ block_group, bitmap_blk);
return ERR_PTR(-ENOMEM);
}

diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index f336cbc6e932..796aa609bcb9 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -138,9 +138,9 @@ ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
}
bh = sb_getblk(sb, bitmap_blk);
if (unlikely(!bh)) {
- ext4_error(sb, "Cannot read inode bitmap - "
- "block_group = %u, inode_bitmap = %llu",
- block_group, bitmap_blk);
+ ext4_warning(sb, "Cannot read inode bitmap - "
+ "block_group = %u, inode_bitmap = %llu",
+ block_group, bitmap_blk);
return ERR_PTR(-ENOMEM);
}
if (bitmap_uptodate(bh))
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 2a4c25c4681d..116ff68c5bd4 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1398,6 +1398,7 @@ static struct buffer_head * ext4_find_entry (struct inode *dir,
goto cleanup_and_exit;
dxtrace(printk(KERN_DEBUG "ext4_find_entry: dx failed, "
"falling back\n"));
+ ret = NULL;
}
nblocks = dir->i_size >> EXT4_BLOCK_SIZE_BITS(sb);
if (!nblocks) {
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index b7f7922061be..130c12974e28 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -776,26 +776,26 @@ void ext4_mark_group_bitmap_corrupted(struct super_block *sb,
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_group_info *grp = ext4_get_group_info(sb, group);
struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL);
+ int ret;

- if ((flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) &&
- !EXT4_MB_GRP_BBITMAP_CORRUPT(grp)) {
- percpu_counter_sub(&sbi->s_freeclusters_counter,
- grp->bb_free);
- set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT,
- &grp->bb_state);
+ if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) {
+ ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT,
+ &grp->bb_state);
+ if (!ret)
+ percpu_counter_sub(&sbi->s_freeclusters_counter,
+ grp->bb_free);
}

- if ((flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) &&
- !EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) {
- if (gdp) {
+ if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) {
+ ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT,
+ &grp->bb_state);
+ if (!ret && gdp) {
int count;

count = ext4_free_inodes_count(sb, gdp);
percpu_counter_sub(&sbi->s_freeinodes_counter,
count);
}
- set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT,
- &grp->bb_state);
}
}

diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c
index f34da0bb8f17..b970a200f20c 100644
--- a/fs/ext4/sysfs.c
+++ b/fs/ext4/sysfs.c
@@ -274,8 +274,12 @@ static ssize_t ext4_attr_show(struct kobject *kobj,
case attr_pointer_ui:
if (!ptr)
return 0;
- return snprintf(buf, PAGE_SIZE, "%u\n",
- *((unsigned int *) ptr));
+ if (a->attr_ptr == ptr_ext4_super_block_offset)
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ le32_to_cpup(ptr));
+ else
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ *((unsigned int *) ptr));
case attr_pointer_atomic:
if (!ptr)
return 0;
@@ -308,7 +312,10 @@ static ssize_t ext4_attr_store(struct kobject *kobj,
ret = kstrtoul(skip_spaces(buf), 0, &t);
if (ret)
return ret;
- *((unsigned int *) ptr) = t;
+ if (a->attr_ptr == ptr_ext4_super_block_offset)
+ *((__le32 *) ptr) = cpu_to_le32(t);
+ else
+ *((unsigned int *) ptr) = t;
return len;
case attr_inode_readahead:
return inode_readahead_blks_store(sbi, buf, len);
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 723df14f4084..f36fc5d5b257 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -190,6 +190,8 @@ ext4_xattr_check_entries(struct ext4_xattr_entry *entry, void *end,
struct ext4_xattr_entry *next = EXT4_XATTR_NEXT(e);
if ((void *)next >= end)
return -EFSCORRUPTED;
+ if (strnlen(e->e_name, e->e_name_len) != e->e_name_len)
+ return -EFSCORRUPTED;
e = next;
}

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index c6b88fa85e2e..4a9ace7280b9 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -127,6 +127,16 @@ static bool fuse_block_alloc(struct fuse_conn *fc, bool for_background)
return !fc->initialized || (for_background && fc->blocked);
}

+static void fuse_drop_waiting(struct fuse_conn *fc)
+{
+ if (fc->connected) {
+ atomic_dec(&fc->num_waiting);
+ } else if (atomic_dec_and_test(&fc->num_waiting)) {
+ /* wake up aborters */
+ wake_up_all(&fc->blocked_waitq);
+ }
+}
+
static struct fuse_req *__fuse_get_req(struct fuse_conn *fc, unsigned npages,
bool for_background)
{
@@ -175,7 +185,7 @@ static struct fuse_req *__fuse_get_req(struct fuse_conn *fc, unsigned npages,
return req;

out:
- atomic_dec(&fc->num_waiting);
+ fuse_drop_waiting(fc);
return ERR_PTR(err);
}

@@ -285,7 +295,7 @@ void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req)

if (test_bit(FR_WAITING, &req->flags)) {
__clear_bit(FR_WAITING, &req->flags);
- atomic_dec(&fc->num_waiting);
+ fuse_drop_waiting(fc);
}

if (req->stolen_file)
@@ -371,7 +381,7 @@ static void request_end(struct fuse_conn *fc, struct fuse_req *req)
struct fuse_iqueue *fiq = &fc->iq;

if (test_and_set_bit(FR_FINISHED, &req->flags))
- return;
+ goto put_request;

spin_lock(&fiq->waitq.lock);
list_del_init(&req->intr_entry);
@@ -400,6 +410,7 @@ static void request_end(struct fuse_conn *fc, struct fuse_req *req)
wake_up(&req->waitq);
if (req->end)
req->end(fc, req);
+put_request:
fuse_put_request(fc, req);
}

@@ -1944,12 +1955,15 @@ static ssize_t fuse_dev_splice_write(struct pipe_inode_info *pipe,
if (!fud)
return -EPERM;

+ pipe_lock(pipe);
+
bufs = kmalloc_array(pipe->buffers, sizeof(struct pipe_buffer),
GFP_KERNEL);
- if (!bufs)
+ if (!bufs) {
+ pipe_unlock(pipe);
return -ENOMEM;
+ }

- pipe_lock(pipe);
nbuf = 0;
rem = 0;
for (idx = 0; idx < pipe->nrbufs && rem < len; idx++)
@@ -2105,6 +2119,7 @@ void fuse_abort_conn(struct fuse_conn *fc, bool is_abort)
set_bit(FR_ABORTED, &req->flags);
if (!test_bit(FR_LOCKED, &req->flags)) {
set_bit(FR_PRIVATE, &req->flags);
+ __fuse_get_request(req);
list_move(&req->list, &to_end1);
}
spin_unlock(&req->waitq.lock);
@@ -2131,7 +2146,6 @@ void fuse_abort_conn(struct fuse_conn *fc, bool is_abort)

while (!list_empty(&to_end1)) {
req = list_first_entry(&to_end1, struct fuse_req, list);
- __fuse_get_request(req);
list_del_init(&req->list);
request_end(fc, req);
}
@@ -2142,6 +2156,11 @@ void fuse_abort_conn(struct fuse_conn *fc, bool is_abort)
}
EXPORT_SYMBOL_GPL(fuse_abort_conn);

+void fuse_wait_aborted(struct fuse_conn *fc)
+{
+ wait_event(fc->blocked_waitq, atomic_read(&fc->num_waiting) == 0);
+}
+
int fuse_dev_release(struct inode *inode, struct file *file)
{
struct fuse_dev *fud = fuse_get_dev(file);
@@ -2149,9 +2168,15 @@ int fuse_dev_release(struct inode *inode, struct file *file)
if (fud) {
struct fuse_conn *fc = fud->fc;
struct fuse_pqueue *fpq = &fud->pq;
+ LIST_HEAD(to_end);

+ spin_lock(&fpq->lock);
WARN_ON(!list_empty(&fpq->io));
- end_requests(fc, &fpq->processing);
+ list_splice_init(&fpq->processing, &to_end);
+ spin_unlock(&fpq->lock);
+
+ end_requests(fc, &to_end);
+
/* Are we the last open device? */
if (atomic_dec_and_test(&fc->dev_count)) {
WARN_ON(fc->iq.fasync != NULL);
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 56231b31f806..606909ed5f21 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -355,11 +355,12 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
struct inode *inode;
struct dentry *newent;
bool outarg_valid = true;
+ bool locked;

- fuse_lock_inode(dir);
+ locked = fuse_lock_inode(dir);
err = fuse_lookup_name(dir->i_sb, get_node_id(dir), &entry->d_name,
&outarg, &inode);
- fuse_unlock_inode(dir);
+ fuse_unlock_inode(dir, locked);
if (err == -ENOENT) {
outarg_valid = false;
err = 0;
@@ -1340,6 +1341,7 @@ static int fuse_readdir(struct file *file, struct dir_context *ctx)
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_req *req;
u64 attr_version = 0;
+ bool locked;

if (is_bad_inode(inode))
return -EIO;
@@ -1367,9 +1369,9 @@ static int fuse_readdir(struct file *file, struct dir_context *ctx)
fuse_read_fill(req, file, ctx->pos, PAGE_SIZE,
FUSE_READDIR);
}
- fuse_lock_inode(inode);
+ locked = fuse_lock_inode(inode);
fuse_request_send(fc, req);
- fuse_unlock_inode(inode);
+ fuse_unlock_inode(inode, locked);
nbytes = req->out.args[0].size;
err = req->out.h.error;
fuse_put_request(fc, req);
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index a201fb0ac64f..aa23749a943b 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -866,6 +866,7 @@ static int fuse_readpages_fill(void *_data, struct page *page)
}

if (WARN_ON(req->num_pages >= req->max_pages)) {
+ unlock_page(page);
fuse_put_request(fc, req);
return -EIO;
}
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 5256ad333b05..f78e9614bb5f 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -862,6 +862,7 @@ void fuse_request_send_background_locked(struct fuse_conn *fc,

/* Abort all requests */
void fuse_abort_conn(struct fuse_conn *fc, bool is_abort);
+void fuse_wait_aborted(struct fuse_conn *fc);

/**
* Invalidate inode attributes
@@ -974,8 +975,8 @@ int fuse_do_setattr(struct dentry *dentry, struct iattr *attr,

void fuse_set_initialized(struct fuse_conn *fc);

-void fuse_unlock_inode(struct inode *inode);
-void fuse_lock_inode(struct inode *inode);
+void fuse_unlock_inode(struct inode *inode, bool locked);
+bool fuse_lock_inode(struct inode *inode);

int fuse_setxattr(struct inode *inode, const char *name, const void *value,
size_t size, int flags);
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index a24df8861b40..2dbd487390a3 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -357,15 +357,21 @@ int fuse_reverse_inval_inode(struct super_block *sb, u64 nodeid,
return 0;
}

-void fuse_lock_inode(struct inode *inode)
+bool fuse_lock_inode(struct inode *inode)
{
- if (!get_fuse_conn(inode)->parallel_dirops)
+ bool locked = false;
+
+ if (!get_fuse_conn(inode)->parallel_dirops) {
mutex_lock(&get_fuse_inode(inode)->mutex);
+ locked = true;
+ }
+
+ return locked;
}

-void fuse_unlock_inode(struct inode *inode)
+void fuse_unlock_inode(struct inode *inode, bool locked)
{
- if (!get_fuse_conn(inode)->parallel_dirops)
+ if (locked)
mutex_unlock(&get_fuse_inode(inode)->mutex);
}

@@ -391,9 +397,6 @@ static void fuse_put_super(struct super_block *sb)
{
struct fuse_conn *fc = get_fuse_conn_super(sb);

- fuse_send_destroy(fc);
-
- fuse_abort_conn(fc, false);
mutex_lock(&fuse_mutex);
list_del(&fc->entry);
fuse_ctl_remove_conn(fc);
@@ -1210,16 +1213,25 @@ static struct dentry *fuse_mount(struct file_system_type *fs_type,
return mount_nodev(fs_type, flags, raw_data, fuse_fill_super);
}

-static void fuse_kill_sb_anon(struct super_block *sb)
+static void fuse_sb_destroy(struct super_block *sb)
{
struct fuse_conn *fc = get_fuse_conn_super(sb);

if (fc) {
+ fuse_send_destroy(fc);
+
+ fuse_abort_conn(fc, false);
+ fuse_wait_aborted(fc);
+
down_write(&fc->killsb);
fc->sb = NULL;
up_write(&fc->killsb);
}
+}

+static void fuse_kill_sb_anon(struct super_block *sb)
+{
+ fuse_sb_destroy(sb);
kill_anon_super(sb);
}

@@ -1242,14 +1254,7 @@ static struct dentry *fuse_mount_blk(struct file_system_type *fs_type,

static void fuse_kill_sb_blk(struct super_block *sb)
{
- struct fuse_conn *fc = get_fuse_conn_super(sb);
-
- if (fc) {
- down_write(&fc->killsb);
- fc->sb = NULL;
- up_write(&fc->killsb);
- }
-
+ fuse_sb_destroy(sb);
kill_block_super(sb);
}

diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 5c13f29bfcdb..118fa197a35f 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -405,6 +405,50 @@ int sysfs_chmod_file(struct kobject *kobj, const struct attribute *attr,
}
EXPORT_SYMBOL_GPL(sysfs_chmod_file);

+/**
+ * sysfs_break_active_protection - break "active" protection
+ * @kobj: The kernel object @attr is associated with.
+ * @attr: The attribute to break the "active" protection for.
+ *
+ * With sysfs, just like kernfs, deletion of an attribute is postponed until
+ * all active .show() and .store() callbacks have finished unless this function
+ * is called. Hence this function is useful in methods that implement self
+ * deletion.
+ */
+struct kernfs_node *sysfs_break_active_protection(struct kobject *kobj,
+ const struct attribute *attr)
+{
+ struct kernfs_node *kn;
+
+ kobject_get(kobj);
+ kn = kernfs_find_and_get(kobj->sd, attr->name);
+ if (kn)
+ kernfs_break_active_protection(kn);
+ return kn;
+}
+EXPORT_SYMBOL_GPL(sysfs_break_active_protection);
+
+/**
+ * sysfs_unbreak_active_protection - restore "active" protection
+ * @kn: Pointer returned by sysfs_break_active_protection().
+ *
+ * Undo the effects of sysfs_break_active_protection(). Since this function
+ * calls kernfs_put() on the kernfs node that corresponds to the 'attr'
+ * argument passed to sysfs_break_active_protection() that attribute may have
+ * been removed between the sysfs_break_active_protection() and
+ * sysfs_unbreak_active_protection() calls, it is not safe to access @kn after
+ * this function has returned.
+ */
+void sysfs_unbreak_active_protection(struct kernfs_node *kn)
+{
+ struct kobject *kobj = kn->parent->priv;
+
+ kernfs_unbreak_active_protection(kn);
+ kernfs_put(kn);
+ kobject_put(kobj);
+}
+EXPORT_SYMBOL_GPL(sysfs_unbreak_active_protection);
+
/**
* sysfs_remove_file_ns - remove an object attribute with a custom ns tag
* @kobj: object we're acting for
diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h
index c9e5a6621b95..c44703f471b3 100644
--- a/include/drm/i915_drm.h
+++ b/include/drm/i915_drm.h
@@ -95,7 +95,9 @@ extern struct resource intel_graphics_stolen_res;
#define I845_TSEG_SIZE_512K (2 << 1)
#define I845_TSEG_SIZE_1M (3 << 1)

-#define INTEL_BSM 0x5c
+#define INTEL_BSM 0x5c
+#define INTEL_GEN11_BSM_DW0 0xc0
+#define INTEL_GEN11_BSM_DW1 0xc4
#define INTEL_BSM_MASK (-(1u << 20))

#endif /* _I915_DRM_H_ */
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 32f247cb5e9e..bc4f87cbe7f4 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1111,6 +1111,8 @@ extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
const struct ata_port_info * const * ppi, int n_ports);
extern int ata_slave_link_init(struct ata_port *ap);
+extern void ata_host_get(struct ata_host *host);
+extern void ata_host_put(struct ata_host *host);
extern int ata_host_start(struct ata_host *host);
extern int ata_host_register(struct ata_host *host,
struct scsi_host_template *sht);
diff --git a/include/linux/printk.h b/include/linux/printk.h
index 6d7e800affd8..3ede9f46a494 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -148,9 +148,13 @@ void early_printk(const char *s, ...) { }
#ifdef CONFIG_PRINTK_NMI
extern void printk_nmi_enter(void);
extern void printk_nmi_exit(void);
+extern void printk_nmi_direct_enter(void);
+extern void printk_nmi_direct_exit(void);
#else
static inline void printk_nmi_enter(void) { }
static inline void printk_nmi_exit(void) { }
+static inline void printk_nmi_direct_enter(void) { }
+static inline void printk_nmi_direct_exit(void) { }
#endif /* PRINTK_NMI */

#ifdef CONFIG_PRINTK
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index b8bfdc173ec0..3c12198c0103 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -237,6 +237,9 @@ int __must_check sysfs_create_files(struct kobject *kobj,
const struct attribute **attr);
int __must_check sysfs_chmod_file(struct kobject *kobj,
const struct attribute *attr, umode_t mode);
+struct kernfs_node *sysfs_break_active_protection(struct kobject *kobj,
+ const struct attribute *attr);
+void sysfs_unbreak_active_protection(struct kernfs_node *kn);
void sysfs_remove_file_ns(struct kobject *kobj, const struct attribute *attr,
const void *ns);
bool sysfs_remove_file_self(struct kobject *kobj, const struct attribute *attr);
@@ -350,6 +353,17 @@ static inline int sysfs_chmod_file(struct kobject *kobj,
return 0;
}

+static inline struct kernfs_node *
+sysfs_break_active_protection(struct kobject *kobj,
+ const struct attribute *attr)
+{
+ return NULL;
+}
+
+static inline void sysfs_unbreak_active_protection(struct kernfs_node *kn)
+{
+}
+
static inline void sysfs_remove_file_ns(struct kobject *kobj,
const struct attribute *attr,
const void *ns)
diff --git a/include/linux/tpm.h b/include/linux/tpm.h
index 06639fb6ab85..8eb5e5ebe136 100644
--- a/include/linux/tpm.h
+++ b/include/linux/tpm.h
@@ -43,6 +43,8 @@ struct tpm_class_ops {
u8 (*status) (struct tpm_chip *chip);
bool (*update_timeouts)(struct tpm_chip *chip,
unsigned long *timeout_cap);
+ int (*go_idle)(struct tpm_chip *chip);
+ int (*cmd_ready)(struct tpm_chip *chip);
int (*request_locality)(struct tpm_chip *chip, int loc);
int (*relinquish_locality)(struct tpm_chip *chip, int loc);
void (*clk_enable)(struct tpm_chip *chip, bool value);
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index 225ab7783dfd..3de3b10da19a 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -161,7 +161,7 @@ struct sata_device {
u8 port_no; /* port number, if this is a PM (Port) */

struct ata_port *ap;
- struct ata_host ata_host;
+ struct ata_host *ata_host;
struct smp_resp rps_resp ____cacheline_aligned; /* report_phy_sata_resp */
u8 fis[ATA_RESP_FIS_SIZE];
};
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index ea619021d901..f3183ad10d96 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -710,9 +710,7 @@ static void reuse_unused_kprobe(struct kprobe *ap)
* there is still a relative jump) and disabled.
*/
op = container_of(ap, struct optimized_kprobe, kp);
- if (unlikely(list_empty(&op->list)))
- printk(KERN_WARNING "Warning: found a stray unused "
- "aggrprobe@%p\n", ap->addr);
+ WARN_ON_ONCE(list_empty(&op->list));
/* Enable the probe again */
ap->flags &= ~KPROBE_FLAG_DISABLED;
/* Optimize it again (remove from op->list) */
@@ -985,7 +983,8 @@ static int arm_kprobe_ftrace(struct kprobe *p)
ret = ftrace_set_filter_ip(&kprobe_ftrace_ops,
(unsigned long)p->addr, 0, 0);
if (ret) {
- pr_debug("Failed to arm kprobe-ftrace at %p (%d)\n", p->addr, ret);
+ pr_debug("Failed to arm kprobe-ftrace at %pS (%d)\n",
+ p->addr, ret);
return ret;
}

@@ -1025,7 +1024,8 @@ static int disarm_kprobe_ftrace(struct kprobe *p)

ret = ftrace_set_filter_ip(&kprobe_ftrace_ops,
(unsigned long)p->addr, 1, 0);
- WARN(ret < 0, "Failed to disarm kprobe-ftrace at %p (%d)\n", p->addr, ret);
+ WARN_ONCE(ret < 0, "Failed to disarm kprobe-ftrace at %pS (%d)\n",
+ p->addr, ret);
return ret;
}
#else /* !CONFIG_KPROBES_ON_FTRACE */
@@ -2169,11 +2169,12 @@ int enable_kprobe(struct kprobe *kp)
}
EXPORT_SYMBOL_GPL(enable_kprobe);

+/* Caller must NOT call this in usual path. This is only for critical case */
void dump_kprobe(struct kprobe *kp)
{
- printk(KERN_WARNING "Dumping kprobe:\n");
- printk(KERN_WARNING "Name: %s\nAddress: %p\nOffset: %x\n",
- kp->symbol_name, kp->addr, kp->offset);
+ pr_err("Dumping kprobe:\n");
+ pr_err("Name: %s\nOffset: %x\nAddress: %pS\n",
+ kp->symbol_name, kp->offset, kp->addr);
}
NOKPROBE_SYMBOL(dump_kprobe);

@@ -2196,11 +2197,8 @@ static int __init populate_kprobe_blacklist(unsigned long *start,
entry = arch_deref_entry_point((void *)*iter);

if (!kernel_text_address(entry) ||
- !kallsyms_lookup_size_offset(entry, &size, &offset)) {
- pr_err("Failed to find blacklist at %p\n",
- (void *)entry);
+ !kallsyms_lookup_size_offset(entry, &size, &offset))
continue;
- }

ent = kmalloc(sizeof(*ent), GFP_KERNEL);
if (!ent)
@@ -2428,8 +2426,16 @@ static int kprobe_blacklist_seq_show(struct seq_file *m, void *v)
struct kprobe_blacklist_entry *ent =
list_entry(v, struct kprobe_blacklist_entry, list);

- seq_printf(m, "0x%px-0x%px\t%ps\n", (void *)ent->start_addr,
- (void *)ent->end_addr, (void *)ent->start_addr);
+ /*
+ * If /proc/kallsyms is not showing kernel address, we won't
+ * show them here either.
+ */
+ if (!kallsyms_show_value())
+ seq_printf(m, "0x%px-0x%px\t%ps\n", NULL, NULL,
+ (void *)ent->start_addr);
+ else
+ seq_printf(m, "0x%px-0x%px\t%ps\n", (void *)ent->start_addr,
+ (void *)ent->end_addr, (void *)ent->start_addr);
return 0;
}

@@ -2611,7 +2617,7 @@ static int __init debugfs_kprobe_init(void)
if (!dir)
return -ENOMEM;

- file = debugfs_create_file("list", 0444, dir, NULL,
+ file = debugfs_create_file("list", 0400, dir, NULL,
&debugfs_kprobes_operations);
if (!file)
goto error;
@@ -2621,7 +2627,7 @@ static int __init debugfs_kprobe_init(void)
if (!file)
goto error;

- file = debugfs_create_file("blacklist", 0444, dir, NULL,
+ file = debugfs_create_file("blacklist", 0400, dir, NULL,
&debugfs_kprobe_blacklist_ops);
if (!file)
goto error;
diff --git a/kernel/printk/internal.h b/kernel/printk/internal.h
index 2a7d04049af4..0f1898820cba 100644
--- a/kernel/printk/internal.h
+++ b/kernel/printk/internal.h
@@ -19,11 +19,16 @@
#ifdef CONFIG_PRINTK

#define PRINTK_SAFE_CONTEXT_MASK 0x3fffffff
-#define PRINTK_NMI_DEFERRED_CONTEXT_MASK 0x40000000
+#define PRINTK_NMI_DIRECT_CONTEXT_MASK 0x40000000
#define PRINTK_NMI_CONTEXT_MASK 0x80000000

extern raw_spinlock_t logbuf_lock;

+__printf(5, 0)
+int vprintk_store(int facility, int level,
+ const char *dict, size_t dictlen,
+ const char *fmt, va_list args);
+
__printf(1, 0) int vprintk_default(const char *fmt, va_list args);
__printf(1, 0) int vprintk_deferred(const char *fmt, va_list args);
__printf(1, 0) int vprintk_func(const char *fmt, va_list args);
@@ -54,6 +59,8 @@ void __printk_safe_exit(void);
local_irq_enable(); \
} while (0)

+void defer_console_output(void);
+
#else

__printf(1, 0) int vprintk_func(const char *fmt, va_list args) { return 0; }
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 247808333ba4..1d1513215c22 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -1824,28 +1824,16 @@ static size_t log_output(int facility, int level, enum log_flags lflags, const c
return log_store(facility, level, lflags, 0, dict, dictlen, text, text_len);
}

-asmlinkage int vprintk_emit(int facility, int level,
- const char *dict, size_t dictlen,
- const char *fmt, va_list args)
+/* Must be called under logbuf_lock. */
+int vprintk_store(int facility, int level,
+ const char *dict, size_t dictlen,
+ const char *fmt, va_list args)
{
static char textbuf[LOG_LINE_MAX];
char *text = textbuf;
size_t text_len;
enum log_flags lflags = 0;
- unsigned long flags;
- int printed_len;
- bool in_sched = false;
-
- if (level == LOGLEVEL_SCHED) {
- level = LOGLEVEL_DEFAULT;
- in_sched = true;
- }
-
- boot_delay_msec(level);
- printk_delay();

- /* This stops the holder of console_sem just where we want him */
- logbuf_lock_irqsave(flags);
/*
* The printf needs to come first; we need the syslog
* prefix which might be passed-in as a parameter.
@@ -1886,8 +1874,29 @@ asmlinkage int vprintk_emit(int facility, int level,
if (dict)
lflags |= LOG_PREFIX|LOG_NEWLINE;

- printed_len = log_output(facility, level, lflags, dict, dictlen, text, text_len);
+ return log_output(facility, level, lflags,
+ dict, dictlen, text, text_len);
+}

+asmlinkage int vprintk_emit(int facility, int level,
+ const char *dict, size_t dictlen,
+ const char *fmt, va_list args)
+{
+ int printed_len;
+ bool in_sched = false;
+ unsigned long flags;
+
+ if (level == LOGLEVEL_SCHED) {
+ level = LOGLEVEL_DEFAULT;
+ in_sched = true;
+ }
+
+ boot_delay_msec(level);
+ printk_delay();
+
+ /* This stops the holder of console_sem just where we want him */
+ logbuf_lock_irqsave(flags);
+ printed_len = vprintk_store(facility, level, dict, dictlen, fmt, args);
logbuf_unlock_irqrestore(flags);

/* If called from the scheduler, we can not call up(). */
@@ -2878,16 +2887,20 @@ void wake_up_klogd(void)
preempt_enable();
}

-int vprintk_deferred(const char *fmt, va_list args)
+void defer_console_output(void)
{
- int r;
-
- r = vprintk_emit(0, LOGLEVEL_SCHED, NULL, 0, fmt, args);
-
preempt_disable();
__this_cpu_or(printk_pending, PRINTK_PENDING_OUTPUT);
irq_work_queue(this_cpu_ptr(&wake_up_klogd_work));
preempt_enable();
+}
+
+int vprintk_deferred(const char *fmt, va_list args)
+{
+ int r;
+
+ r = vprintk_emit(0, LOGLEVEL_SCHED, NULL, 0, fmt, args);
+ defer_console_output();

return r;
}
diff --git a/kernel/printk/printk_safe.c b/kernel/printk/printk_safe.c
index d7d091309054..a0a74c533e4b 100644
--- a/kernel/printk/printk_safe.c
+++ b/kernel/printk/printk_safe.c
@@ -308,24 +308,33 @@ static __printf(1, 0) int vprintk_nmi(const char *fmt, va_list args)

void printk_nmi_enter(void)
{
- /*
- * The size of the extra per-CPU buffer is limited. Use it only when
- * the main one is locked. If this CPU is not in the safe context,
- * the lock must be taken on another CPU and we could wait for it.
- */
- if ((this_cpu_read(printk_context) & PRINTK_SAFE_CONTEXT_MASK) &&
- raw_spin_is_locked(&logbuf_lock)) {
- this_cpu_or(printk_context, PRINTK_NMI_CONTEXT_MASK);
- } else {
- this_cpu_or(printk_context, PRINTK_NMI_DEFERRED_CONTEXT_MASK);
- }
+ this_cpu_or(printk_context, PRINTK_NMI_CONTEXT_MASK);
}

void printk_nmi_exit(void)
{
- this_cpu_and(printk_context,
- ~(PRINTK_NMI_CONTEXT_MASK |
- PRINTK_NMI_DEFERRED_CONTEXT_MASK));
+ this_cpu_and(printk_context, ~PRINTK_NMI_CONTEXT_MASK);
+}
+
+/*
+ * Marks a code that might produce many messages in NMI context
+ * and the risk of losing them is more critical than eventual
+ * reordering.
+ *
+ * It has effect only when called in NMI context. Then printk()
+ * will try to store the messages into the main logbuf directly
+ * and use the per-CPU buffers only as a fallback when the lock
+ * is not available.
+ */
+void printk_nmi_direct_enter(void)
+{
+ if (this_cpu_read(printk_context) & PRINTK_NMI_CONTEXT_MASK)
+ this_cpu_or(printk_context, PRINTK_NMI_DIRECT_CONTEXT_MASK);
+}
+
+void printk_nmi_direct_exit(void)
+{
+ this_cpu_and(printk_context, ~PRINTK_NMI_DIRECT_CONTEXT_MASK);
}

#else
@@ -363,6 +372,20 @@ void __printk_safe_exit(void)

__printf(1, 0) int vprintk_func(const char *fmt, va_list args)
{
+ /*
+ * Try to use the main logbuf even in NMI. But avoid calling console
+ * drivers that might have their own locks.
+ */
+ if ((this_cpu_read(printk_context) & PRINTK_NMI_DIRECT_CONTEXT_MASK) &&
+ raw_spin_trylock(&logbuf_lock)) {
+ int len;
+
+ len = vprintk_store(0, LOGLEVEL_DEFAULT, NULL, 0, fmt, args);
+ raw_spin_unlock(&logbuf_lock);
+ defer_console_output();
+ return len;
+ }
+
/* Use extra buffer in NMI when logbuf_lock is taken or in safe mode. */
if (this_cpu_read(printk_context) & PRINTK_NMI_CONTEXT_MASK)
return vprintk_nmi(fmt, args);
@@ -371,13 +394,6 @@ __printf(1, 0) int vprintk_func(const char *fmt, va_list args)
if (this_cpu_read(printk_context) & PRINTK_SAFE_CONTEXT_MASK)
return vprintk_safe(fmt, args);

- /*
- * Use the main logbuf when logbuf_lock is available in NMI.
- * But avoid calling console drivers that might have their own locks.
- */
- if (this_cpu_read(printk_context) & PRINTK_NMI_DEFERRED_CONTEXT_MASK)
- return vprintk_deferred(fmt, args);
-
/* No obstacles. */
return vprintk_default(fmt, args);
}
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index e190d1ef3a23..067cb83f37ea 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -81,6 +81,7 @@ static bool cpu_stop_queue_work(unsigned int cpu, struct cpu_stop_work *work)
unsigned long flags;
bool enabled;

+ preempt_disable();
raw_spin_lock_irqsave(&stopper->lock, flags);
enabled = stopper->enabled;
if (enabled)
@@ -90,6 +91,7 @@ static bool cpu_stop_queue_work(unsigned int cpu, struct cpu_stop_work *work)
raw_spin_unlock_irqrestore(&stopper->lock, flags);

wake_up_q(&wakeq);
+ preempt_enable();

return enabled;
}
@@ -236,13 +238,24 @@ static int cpu_stop_queue_two_works(int cpu1, struct cpu_stop_work *work1,
struct cpu_stopper *stopper2 = per_cpu_ptr(&cpu_stopper, cpu2);
DEFINE_WAKE_Q(wakeq);
int err;
+
retry:
+ /*
+ * The waking up of stopper threads has to happen in the same
+ * scheduling context as the queueing. Otherwise, there is a
+ * possibility of one of the above stoppers being woken up by another
+ * CPU, and preempting us. This will cause us to not wake up the other
+ * stopper forever.
+ */
+ preempt_disable();
raw_spin_lock_irq(&stopper1->lock);
raw_spin_lock_nested(&stopper2->lock, SINGLE_DEPTH_NESTING);

- err = -ENOENT;
- if (!stopper1->enabled || !stopper2->enabled)
+ if (!stopper1->enabled || !stopper2->enabled) {
+ err = -ENOENT;
goto unlock;
+ }
+
/*
* Ensure that if we race with __stop_cpus() the stoppers won't get
* queued up in reverse order leading to system deadlock.
@@ -253,36 +266,30 @@ static int cpu_stop_queue_two_works(int cpu1, struct cpu_stop_work *work1,
* It can be falsely true but it is safe to spin until it is cleared,
* queue_stop_cpus_work() does everything under preempt_disable().
*/
- err = -EDEADLK;
- if (unlikely(stop_cpus_in_progress))
- goto unlock;
+ if (unlikely(stop_cpus_in_progress)) {
+ err = -EDEADLK;
+ goto unlock;
+ }

err = 0;
__cpu_stop_queue_work(stopper1, work1, &wakeq);
__cpu_stop_queue_work(stopper2, work2, &wakeq);
- /*
- * The waking up of stopper threads has to happen
- * in the same scheduling context as the queueing.
- * Otherwise, there is a possibility of one of the
- * above stoppers being woken up by another CPU,
- * and preempting us. This will cause us to n ot
- * wake up the other stopper forever.
- */
- preempt_disable();
+
unlock:
raw_spin_unlock(&stopper2->lock);
raw_spin_unlock_irq(&stopper1->lock);

if (unlikely(err == -EDEADLK)) {
+ preempt_enable();
+
while (stop_cpus_in_progress)
cpu_relax();
+
goto retry;
}

- if (!err) {
- wake_up_q(&wakeq);
- preempt_enable();
- }
+ wake_up_q(&wakeq);
+ preempt_enable();

return err;
}
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 823687997b01..176debd3481b 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -8288,6 +8288,7 @@ void ftrace_dump(enum ftrace_dump_mode oops_dump_mode)
tracing_off();

local_irq_save(flags);
+ printk_nmi_direct_enter();

/* Simulate the iterator */
trace_init_global_iter(&iter);
@@ -8367,7 +8368,8 @@ void ftrace_dump(enum ftrace_dump_mode oops_dump_mode)
for_each_tracing_cpu(cpu) {
atomic_dec(&per_cpu_ptr(iter.trace_buffer->data, cpu)->disabled);
}
- atomic_dec(&dump_running);
+ atomic_dec(&dump_running);
+ printk_nmi_direct_exit();
local_irq_restore(flags);
}
EXPORT_SYMBOL_GPL(ftrace_dump);
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 576d18045811..51f5a64d9ec2 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -266,7 +266,7 @@ static void __touch_watchdog(void)
* entering idle state. This should only be used for scheduler events.
* Use touch_softlockup_watchdog() for everything else.
*/
-void touch_softlockup_watchdog_sched(void)
+notrace void touch_softlockup_watchdog_sched(void)
{
/*
* Preemption can be enabled. It doesn't matter which CPU's timestamp
@@ -275,7 +275,7 @@ void touch_softlockup_watchdog_sched(void)
raw_cpu_write(watchdog_touch_ts, 0);
}

-void touch_softlockup_watchdog(void)
+notrace void touch_softlockup_watchdog(void)
{
touch_softlockup_watchdog_sched();
wq_watchdog_touch(raw_smp_processor_id());
diff --git a/kernel/watchdog_hld.c b/kernel/watchdog_hld.c
index e449a23e9d59..4ece6028007a 100644
--- a/kernel/watchdog_hld.c
+++ b/kernel/watchdog_hld.c
@@ -29,7 +29,7 @@ static struct cpumask dead_events_mask;
static unsigned long hardlockup_allcpu_dumped;
static atomic_t watchdog_cpus = ATOMIC_INIT(0);

-void arch_touch_nmi_watchdog(void)
+notrace void arch_touch_nmi_watchdog(void)
{
/*
* Using __raw here because some code paths have
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 78b192071ef7..5f78c6e41796 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -5559,7 +5559,7 @@ static void wq_watchdog_timer_fn(struct timer_list *unused)
mod_timer(&wq_watchdog_timer, jiffies + thresh);
}

-void wq_watchdog_touch(int cpu)
+notrace void wq_watchdog_touch(int cpu)
{
if (cpu >= 0)
per_cpu(wq_watchdog_touched_cpu, cpu) = jiffies;
diff --git a/lib/nmi_backtrace.c b/lib/nmi_backtrace.c
index 61a6b5aab07e..15ca78e1c7d4 100644
--- a/lib/nmi_backtrace.c
+++ b/lib/nmi_backtrace.c
@@ -87,11 +87,9 @@ void nmi_trigger_cpumask_backtrace(const cpumask_t *mask,

bool nmi_cpu_backtrace(struct pt_regs *regs)
{
- static arch_spinlock_t lock = __ARCH_SPIN_LOCK_UNLOCKED;
int cpu = smp_processor_id();

if (cpumask_test_cpu(cpu, to_cpumask(backtrace_mask))) {
- arch_spin_lock(&lock);
if (regs && cpu_in_idle(instruction_pointer(regs))) {
pr_warn("NMI backtrace for cpu %d skipped: idling at %pS\n",
cpu, (void *)instruction_pointer(regs));
@@ -102,7 +100,6 @@ bool nmi_cpu_backtrace(struct pt_regs *regs)
else
dump_stack();
}
- arch_spin_unlock(&lock);
cpumask_clear_cpu(cpu, to_cpumask(backtrace_mask));
return true;
}
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index a48aaa79d352..cda186230287 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1942,6 +1942,7 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr,
case 'F':
return device_node_string(buf, end, ptr, spec, fmt + 1);
}
+ break;
case 'x':
return pointer_string(buf, end, ptr, spec);
}
diff --git a/mm/memory.c b/mm/memory.c
index 0e356dd923c2..86d4329acb05 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -245,9 +245,6 @@ static void tlb_flush_mmu_tlbonly(struct mmu_gather *tlb)

tlb_flush(tlb);
mmu_notifier_invalidate_range(tlb->mm, tlb->start, tlb->end);
-#ifdef CONFIG_HAVE_RCU_TABLE_FREE
- tlb_table_flush(tlb);
-#endif
__tlb_reset_range(tlb);
}

@@ -255,6 +252,9 @@ static void tlb_flush_mmu_free(struct mmu_gather *tlb)
{
struct mmu_gather_batch *batch;

+#ifdef CONFIG_HAVE_RCU_TABLE_FREE
+ tlb_table_flush(tlb);
+#endif
for (batch = &tlb->local; batch && batch->nr; batch = batch->next) {
free_pages_and_swap_cache(batch->pages, batch->nr);
batch->nr = 0;
@@ -330,6 +330,21 @@ bool __tlb_remove_page_size(struct mmu_gather *tlb, struct page *page, int page_
* See the comment near struct mmu_table_batch.
*/

+/*
+ * If we want tlb_remove_table() to imply TLB invalidates.
+ */
+static inline void tlb_table_invalidate(struct mmu_gather *tlb)
+{
+#ifdef CONFIG_HAVE_RCU_TABLE_INVALIDATE
+ /*
+ * Invalidate page-table caches used by hardware walkers. Then we still
+ * need to RCU-sched wait while freeing the pages because software
+ * walkers can still be in-flight.
+ */
+ tlb_flush_mmu_tlbonly(tlb);
+#endif
+}
+
static void tlb_remove_table_smp_sync(void *arg)
{
/* Simply deliver the interrupt */
@@ -366,6 +381,7 @@ void tlb_table_flush(struct mmu_gather *tlb)
struct mmu_table_batch **batch = &tlb->batch;

if (*batch) {
+ tlb_table_invalidate(tlb);
call_rcu_sched(&(*batch)->rcu, tlb_remove_table_rcu);
*batch = NULL;
}
@@ -387,11 +403,13 @@ void tlb_remove_table(struct mmu_gather *tlb, void *table)
if (*batch == NULL) {
*batch = (struct mmu_table_batch *)__get_free_page(GFP_NOWAIT | __GFP_NOWARN);
if (*batch == NULL) {
+ tlb_table_invalidate(tlb);
tlb_remove_table_one(table);
return;
}
(*batch)->nr = 0;
}
+
(*batch)->tables[(*batch)->nr++] = table;
if ((*batch)->nr == MAX_TABLE_BATCH)
tlb_table_flush(tlb);
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 16161a36dc73..e8d1024dc547 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -280,7 +280,6 @@ rpcrdma_conn_upcall(struct rdma_cm_id *id, struct rdma_cm_event *event)
++xprt->rx_xprt.connect_cookie;
connstate = -ECONNABORTED;
connected:
- xprt->rx_buf.rb_credits = 1;
ep->rep_connected = connstate;
rpcrdma_conn_func(ep);
wake_up_all(&ep->rep_connect_wait);
@@ -755,6 +754,7 @@ rpcrdma_ep_connect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia)
}

ep->rep_connected = 0;
+ rpcrdma_post_recvs(r_xprt, true);

rc = rdma_connect(ia->ri_id, &ep->rep_remote_cma);
if (rc) {
@@ -773,8 +773,6 @@ rpcrdma_ep_connect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia)

dprintk("RPC: %s: connected\n", __func__);

- rpcrdma_post_recvs(r_xprt, true);
-
out:
if (rc)
ep->rep_connected = rc;
@@ -1171,6 +1169,7 @@ rpcrdma_buffer_create(struct rpcrdma_xprt *r_xprt)
list_add(&req->rl_list, &buf->rb_send_bufs);
}

+ buf->rb_credits = 1;
buf->rb_posted_receives = 0;
INIT_LIST_HEAD(&buf->rb_recv_bufs);

diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index 0057d8eafcc1..8f0f508a78e9 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -1062,7 +1062,7 @@ sub dump_struct($$) {
my $x = shift;
my $file = shift;

- if ($x =~ /(struct|union)\s+(\w+)\s*{(.*)}/) {
+ if ($x =~ /(struct|union)\s+(\w+)\s*\{(.*)\}/) {
my $decl_type = $1;
$declaration_name = $2;
my $members = $3;
@@ -1148,20 +1148,20 @@ sub dump_struct($$) {
}
}
}
- $members =~ s/(struct|union)([^\{\};]+)\{([^\{\}]*)}([^\{\}\;]*)\;/$newmember/;
+ $members =~ s/(struct|union)([^\{\};]+)\{([^\{\}]*)\}([^\{\}\;]*)\;/$newmember/;
}

# Ignore other nested elements, like enums
- $members =~ s/({[^\{\}]*})//g;
+ $members =~ s/(\{[^\{\}]*\})//g;

create_parameterlist($members, ';', $file, $declaration_name);
check_sections($file, $declaration_name, $decl_type, $sectcheck, $struct_actual);

# Adjust declaration for better display
- $declaration =~ s/([{;])/$1\n/g;
- $declaration =~ s/}\s+;/};/g;
+ $declaration =~ s/([\{;])/$1\n/g;
+ $declaration =~ s/\}\s+;/};/g;
# Better handle inlined enums
- do {} while ($declaration =~ s/(enum\s+{[^}]+),([^\n])/$1,\n$2/);
+ do {} while ($declaration =~ s/(enum\s+\{[^\}]+),([^\n])/$1,\n$2/);

my @def_args = split /\n/, $declaration;
my $level = 1;
@@ -1171,12 +1171,12 @@ sub dump_struct($$) {
$clause =~ s/\s+$//;
$clause =~ s/\s+/ /;
next if (!$clause);
- $level-- if ($clause =~ m/(})/ && $level > 1);
+ $level-- if ($clause =~ m/(\})/ && $level > 1);
if (!($clause =~ m/^\s*#/)) {
$declaration .= "\t" x $level;
}
$declaration .= "\t" . $clause . "\n";
- $level++ if ($clause =~ m/({)/ && !($clause =~m/}/));
+ $level++ if ($clause =~ m/(\{)/ && !($clause =~m/\}/));
}
output_declaration($declaration_name,
'struct',
@@ -1244,7 +1244,7 @@ sub dump_enum($$) {
# strip #define macros inside enums
$x =~ s@#\s*((define|ifdef)\s+|endif)[^;]*;@@gos;

- if ($x =~ /enum\s+(\w+)\s*{(.*)}/) {
+ if ($x =~ /enum\s+(\w+)\s*\{(.*)\}/) {
$declaration_name = $1;
my $members = $2;
my %_members;
@@ -1785,7 +1785,7 @@ sub process_proto_type($$) {
}

while (1) {
- if ( $x =~ /([^{};]*)([{};])(.*)/ ) {
+ if ( $x =~ /([^\{\};]*)([\{\};])(.*)/ ) {
if( length $prototype ) {
$prototype .= " "
}
diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 2fcdd84021a5..86c7805da997 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -2642,7 +2642,10 @@ int wm_adsp2_preloader_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
- struct wm_adsp *dsp = snd_soc_component_get_drvdata(component);
+ struct wm_adsp *dsps = snd_soc_component_get_drvdata(component);
+ struct soc_mixer_control *mc =
+ (struct soc_mixer_control *)kcontrol->private_value;
+ struct wm_adsp *dsp = &dsps[mc->shift - 1];

ucontrol->value.integer.value[0] = dsp->preloaded;

@@ -2654,10 +2657,11 @@ int wm_adsp2_preloader_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
- struct wm_adsp *dsp = snd_soc_component_get_drvdata(component);
+ struct wm_adsp *dsps = snd_soc_component_get_drvdata(component);
struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
+ struct wm_adsp *dsp = &dsps[mc->shift - 1];
char preload[32];

snprintf(preload, ARRAY_SIZE(preload), "DSP%u Preload", mc->shift);
diff --git a/sound/soc/sirf/sirf-usp.c b/sound/soc/sirf/sirf-usp.c
index 77e7dcf969d0..d70fcd4a1adf 100644
--- a/sound/soc/sirf/sirf-usp.c
+++ b/sound/soc/sirf/sirf-usp.c
@@ -370,10 +370,9 @@ static int sirf_usp_pcm_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, usp);

mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- base = devm_ioremap(&pdev->dev, mem_res->start,
- resource_size(mem_res));
- if (base == NULL)
- return -ENOMEM;
+ base = devm_ioremap_resource(&pdev->dev, mem_res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
usp->regmap = devm_regmap_init_mmio(&pdev->dev, base,
&sirf_usp_regmap_config);
if (IS_ERR(usp->regmap))
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 5e7ae47a9658..5feae9666822 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -1694,6 +1694,14 @@ static u64 dpcm_runtime_base_format(struct snd_pcm_substream *substream)
int i;

for (i = 0; i < be->num_codecs; i++) {
+ /*
+ * Skip CODECs which don't support the current stream
+ * type. See soc_pcm_init_runtime_hw() for more details
+ */
+ if (!snd_soc_dai_stream_valid(be->codec_dais[i],
+ stream))
+ continue;
+
codec_dai_drv = be->codec_dais[i]->driver;
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
codec_stream = &codec_dai_drv->playback;
diff --git a/sound/soc/zte/zx-tdm.c b/sound/soc/zte/zx-tdm.c
index dc955272f58b..389272eeba9a 100644
--- a/sound/soc/zte/zx-tdm.c
+++ b/sound/soc/zte/zx-tdm.c
@@ -144,8 +144,8 @@ static void zx_tdm_rx_dma_en(struct zx_tdm_info *tdm, bool on)
#define ZX_TDM_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000)

#define ZX_TDM_FMTBIT \
- (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FORMAT_MU_LAW | \
- SNDRV_PCM_FORMAT_A_LAW)
+ (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_MU_LAW | \
+ SNDRV_PCM_FMTBIT_A_LAW)

static int zx_tdm_dai_probe(struct snd_soc_dai *dai)
{
diff --git a/tools/perf/arch/s390/util/kvm-stat.c b/tools/perf/arch/s390/util/kvm-stat.c
index d233e2eb9592..aaabab5e2830 100644
--- a/tools/perf/arch/s390/util/kvm-stat.c
+++ b/tools/perf/arch/s390/util/kvm-stat.c
@@ -102,7 +102,7 @@ const char * const kvm_skip_events[] = {

int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid)
{
- if (strstr(cpuid, "IBM/S390")) {
+ if (strstr(cpuid, "IBM")) {
kvm->exit_reasons = sie_exit_reasons;
kvm->exit_reasons_isa = "SIE";
} else
diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c
index bd3d57f40f1b..17cecc96f735 100644
--- a/virt/kvm/arm/arch_timer.c
+++ b/virt/kvm/arm/arch_timer.c
@@ -295,9 +295,9 @@ static void phys_timer_emulate(struct kvm_vcpu *vcpu)
struct arch_timer_context *ptimer = vcpu_ptimer(vcpu);

/*
- * If the timer can fire now we have just raised the IRQ line and we
- * don't need to have a soft timer scheduled for the future. If the
- * timer cannot fire at all, then we also don't need a soft timer.
+ * If the timer can fire now, we don't need to have a soft timer
+ * scheduled for the future. If the timer cannot fire at all,
+ * then we also don't need a soft timer.
*/
if (kvm_timer_should_fire(ptimer) || !kvm_timer_irq_can_fire(ptimer)) {
soft_timer_cancel(&timer->phys_timer, NULL);
@@ -332,10 +332,10 @@ static void kvm_timer_update_state(struct kvm_vcpu *vcpu)
level = kvm_timer_should_fire(vtimer);
kvm_timer_update_irq(vcpu, level, vtimer);

+ phys_timer_emulate(vcpu);
+
if (kvm_timer_should_fire(ptimer) != ptimer->irq.level)
kvm_timer_update_irq(vcpu, !ptimer->irq.level, ptimer);
-
- phys_timer_emulate(vcpu);
}

static void vtimer_save_state(struct kvm_vcpu *vcpu)
@@ -487,6 +487,7 @@ void kvm_timer_vcpu_load(struct kvm_vcpu *vcpu)
{
struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
struct arch_timer_context *vtimer = vcpu_vtimer(vcpu);
+ struct arch_timer_context *ptimer = vcpu_ptimer(vcpu);

if (unlikely(!timer->enabled))
return;
@@ -502,6 +503,10 @@ void kvm_timer_vcpu_load(struct kvm_vcpu *vcpu)

/* Set the background timer for the physical timer emulation. */
phys_timer_emulate(vcpu);
+
+ /* If the timer fired while we weren't running, inject it now */
+ if (kvm_timer_should_fire(ptimer) != ptimer->irq.level)
+ kvm_timer_update_irq(vcpu, !ptimer->irq.level, ptimer);
}

bool kvm_timer_should_notify_user(struct kvm_vcpu *vcpu)
diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
index 1d90d79706bd..c2b95a22959b 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -1015,19 +1015,35 @@ static int stage2_set_pmd_huge(struct kvm *kvm, struct kvm_mmu_memory_cache
pmd = stage2_get_pmd(kvm, cache, addr);
VM_BUG_ON(!pmd);

- /*
- * Mapping in huge pages should only happen through a fault. If a
- * page is merged into a transparent huge page, the individual
- * subpages of that huge page should be unmapped through MMU
- * notifiers before we get here.
- *
- * Merging of CompoundPages is not supported; they should become
- * splitting first, unmapped, merged, and mapped back in on-demand.
- */
- VM_BUG_ON(pmd_present(*pmd) && pmd_pfn(*pmd) != pmd_pfn(*new_pmd));
-
old_pmd = *pmd;
if (pmd_present(old_pmd)) {
+ /*
+ * Multiple vcpus faulting on the same PMD entry, can
+ * lead to them sequentially updating the PMD with the
+ * same value. Following the break-before-make
+ * (pmd_clear() followed by tlb_flush()) process can
+ * hinder forward progress due to refaults generated
+ * on missing translations.
+ *
+ * Skip updating the page table if the entry is
+ * unchanged.
+ */
+ if (pmd_val(old_pmd) == pmd_val(*new_pmd))
+ return 0;
+
+ /*
+ * Mapping in huge pages should only happen through a
+ * fault. If a page is merged into a transparent huge
+ * page, the individual subpages of that huge page
+ * should be unmapped through MMU notifiers before we
+ * get here.
+ *
+ * Merging of CompoundPages is not supported; they
+ * should become splitting first, unmapped, merged,
+ * and mapped back in on-demand.
+ */
+ VM_BUG_ON(pmd_pfn(old_pmd) != pmd_pfn(*new_pmd));
+
pmd_clear(pmd);
kvm_tlb_flush_vmid_ipa(kvm, addr);
} else {
@@ -1102,6 +1118,10 @@ static int stage2_set_pte(struct kvm *kvm, struct kvm_mmu_memory_cache *cache,
/* Create 2nd stage page table mapping - Level 3 */
old_pte = *pte;
if (pte_present(old_pte)) {
+ /* Skip page table update if there is no change */
+ if (pte_val(old_pte) == pte_val(*new_pte))
+ return 0;
+
kvm_set_pte(pte, __pte(0));
kvm_tlb_flush_vmid_ipa(kvm, addr);
} else {
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