[patch V2 08/36] PCI/MSI: Let the irq code handle sysfs groups

[Thomas Gleixner <tglx@xxxxxxxxxxxxx>]

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@xxxxxxxxxxxxx>
Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
---
 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(-)

--- a/drivers/pci/msi/irqdomain.c
+++ b/drivers/pci/msi/irqdomain.c
@@ -159,7 +159,7 @@ struct irq_domain *pci_msi_create_irq_do
        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;
 
--- a/drivers/pci/msi/legacy.c
+++ b/drivers/pci/msi/legacy.c
@@ -70,10 +70,14 @@ int pci_msi_legacy_setup_msi_irqs(struct
 {
        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);
 }
--- a/drivers/pci/msi/msi.c
+++ b/drivers/pci/msi/msi.c
@@ -233,11 +233,6 @@ static void free_msi_irqs(struct pci_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) {
@@ -417,7 +412,6 @@ static int msi_verify_entries(struct pci
 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;
 
@@ -441,14 +435,6 @@ static int msi_capability_init(struct pc
        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);
@@ -576,7 +562,6 @@ static void msix_mask_all(void __iomem *
 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;
@@ -618,14 +603,6 @@ static int msix_capability_init(struct p
 
        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;
-
        /* Set MSI-X enabled bits and unmask the function */
        pci_intx_for_msi(dev, 0);
        dev->msix_enabled = 1;
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -475,7 +475,6 @@ 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