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Subject[PATCH] KVM: arm: fix missing free_percpu_irq in kvm_timer_hyp_init()
Date
From: Miaohe Lin <linmiaohe@huawei.com>

When host_ptimer_irq request irq resource failed, we forget
to release the host_vtimer_irq resource already requested.
Fix this missing irq release and other similar scenario.

Fixes: 9e01dc76be6a ("KVM: arm/arm64: arch_timer: Assign the phys timer on VHE systems")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
virt/kvm/arm/arch_timer.c | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c
index f182b2380345..73867f97040c 100644
--- a/virt/kvm/arm/arch_timer.c
+++ b/virt/kvm/arm/arch_timer.c
@@ -935,7 +935,7 @@ int kvm_timer_hyp_init(bool has_gic)
kvm_get_running_vcpus());
if (err) {
kvm_err("kvm_arch_timer: error setting vcpu affinity\n");
- goto out_free_irq;
+ goto out_free_vtimer_irq;
}

static_branch_enable(&has_gic_active_state);
@@ -960,7 +960,7 @@ int kvm_timer_hyp_init(bool has_gic)
if (err) {
kvm_err("kvm_arch_timer: can't request ptimer interrupt %d (%d)\n",
host_ptimer_irq, err);
- return err;
+ goto out_disable_gic_state;
}

if (has_gic) {
@@ -968,7 +968,7 @@ int kvm_timer_hyp_init(bool has_gic)
kvm_get_running_vcpus());
if (err) {
kvm_err("kvm_arch_timer: error setting vcpu affinity\n");
- goto out_free_irq;
+ goto out_free_ptimer_irq;
}
}

@@ -977,15 +977,22 @@ int kvm_timer_hyp_init(bool has_gic)
kvm_err("kvm_arch_timer: invalid physical timer IRQ: %d\n",
info->physical_irq);
err = -ENODEV;
- goto out_free_irq;
+ goto out_disable_gic_state;
}

cpuhp_setup_state(CPUHP_AP_KVM_ARM_TIMER_STARTING,
"kvm/arm/timer:starting", kvm_timer_starting_cpu,
kvm_timer_dying_cpu);
return 0;
-out_free_irq:
+
+out_free_ptimer_irq:
+ free_percpu_irq(host_ptimer_irq, kvm_get_running_vcpus());
+out_disable_gic_state:
+ if (has_gic)
+ static_branch_disable(&has_gic_active_state);
+out_free_vtimer_irq:
free_percpu_irq(host_vtimer_irq, kvm_get_running_vcpus());
+
return err;
}

--
2.19.1
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