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Subject[tip: irq/msi] PCI/MSI: Let the irq code handle sysfs groups
The following commit has been merged into the irq/msi branch of tip:

Commit-ID: ffd84485e6beb9cad3e5a133d88201b995298c33
Gitweb: https://git.kernel.org/tip/ffd84485e6beb9cad3e5a133d88201b995298c33
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Fri, 10 Dec 2021 23:19:05 +01:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Thu, 16 Dec 2021 22:16:39 +01:00

PCI/MSI: Let the irq code handle sysfs groups

Set the domain info flag which makes the core code handle sysfs groups and
put an explicit invocation into the legacy code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20211210221814.048612053@linutronix.de

---
drivers/pci/msi/irqdomain.c | 2 +-
drivers/pci/msi/legacy.c | 6 +++++-
drivers/pci/msi/msi.c | 23 -----------------------
include/linux/pci.h | 1 -
4 files changed, 6 insertions(+), 26 deletions(-)

diff --git a/drivers/pci/msi/irqdomain.c b/drivers/pci/msi/irqdomain.c
index a554690..26b23a1 100644
--- a/drivers/pci/msi/irqdomain.c
+++ b/drivers/pci/msi/irqdomain.c
@@ -159,7 +159,7 @@ struct irq_domain *pci_msi_create_irq_domain(struct fwnode_handle *fwnode,
if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS)
pci_msi_domain_update_chip_ops(info);

- info->flags |= MSI_FLAG_ACTIVATE_EARLY;
+ info->flags |= MSI_FLAG_ACTIVATE_EARLY | MSI_FLAG_DEV_SYSFS;
if (IS_ENABLED(CONFIG_GENERIC_IRQ_RESERVATION_MODE))
info->flags |= MSI_FLAG_MUST_REACTIVATE;

diff --git a/drivers/pci/msi/legacy.c b/drivers/pci/msi/legacy.c
index d52cff1..773f351 100644
--- a/drivers/pci/msi/legacy.c
+++ b/drivers/pci/msi/legacy.c
@@ -70,10 +70,14 @@ int pci_msi_legacy_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
{
int ret = arch_setup_msi_irqs(dev, nvec, type);

- return pci_msi_setup_check_result(dev, type, ret);
+ ret = pci_msi_setup_check_result(dev, type, ret);
+ if (!ret)
+ ret = msi_device_populate_sysfs(&dev->dev);
+ return ret;
}

void pci_msi_legacy_teardown_msi_irqs(struct pci_dev *dev)
{
+ msi_device_destroy_sysfs(&dev->dev);
arch_teardown_msi_irqs(dev);
}
diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c
index 369e3c5..76c15be 100644
--- a/drivers/pci/msi/msi.c
+++ b/drivers/pci/msi/msi.c
@@ -233,11 +233,6 @@ static void free_msi_irqs(struct pci_dev *dev)
for (i = 0; i < entry->nvec_used; i++)
BUG_ON(irq_has_action(entry->irq + i));

- if (dev->msi_irq_groups) {
- msi_destroy_sysfs(&dev->dev, dev->msi_irq_groups);
- dev->msi_irq_groups = NULL;
- }
-
pci_msi_teardown_msi_irqs(dev);

list_for_each_entry_safe(entry, tmp, msi_list, list) {
@@ -455,7 +450,6 @@ static int msi_verify_entries(struct pci_dev *dev)
static int msi_capability_init(struct pci_dev *dev, int nvec,
struct irq_affinity *affd)
{
- const struct attribute_group **groups;
struct msi_desc *entry;
int ret;

@@ -486,14 +480,6 @@ static int msi_capability_init(struct pci_dev *dev, int nvec,
if (ret)
goto err;

- groups = msi_populate_sysfs(&dev->dev);
- if (IS_ERR(groups)) {
- ret = PTR_ERR(groups);
- goto err;
- }
-
- dev->msi_irq_groups = groups;
-
/* Set MSI enabled bits */
pci_intx_for_msi(dev, 0);
pci_msi_set_enable(dev, 1);
@@ -622,7 +608,6 @@ static void msix_mask_all(void __iomem *base, int tsize)
static int msix_capability_init(struct pci_dev *dev, struct msix_entry *entries,
int nvec, struct irq_affinity *affd)
{
- const struct attribute_group **groups;
void __iomem *base;
int ret, tsize;
u16 control;
@@ -664,14 +649,6 @@ static int msix_capability_init(struct pci_dev *dev, struct msix_entry *entries,

msix_update_entries(dev, entries);

- groups = msi_populate_sysfs(&dev->dev);
- if (IS_ERR(groups)) {
- ret = PTR_ERR(groups);
- goto out_free;
- }
-
- dev->msi_irq_groups = groups;
-
/* Disable INTX */
pci_intx_for_msi(dev, 0);

diff --git a/include/linux/pci.h b/include/linux/pci.h
index a09736d..0a7b6b2 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -476,7 +476,6 @@ struct pci_dev {
#ifdef CONFIG_PCI_MSI
void __iomem *msix_base;
raw_spinlock_t msi_lock;
- const struct attribute_group **msi_irq_groups;
#endif
struct pci_vpd vpd;
#ifdef CONFIG_PCIE_DPC
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