[patch V3 14/35] PCI/MSI: Let the irq code handle sysfs groups

[Thomas Gleixner <tglx@xxxxxxxxxxxxx>]

From: 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>
Acked-by: Bjorn Helgaas <bhelgaas@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;
 
@@ -448,14 +442,6 @@ 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);
@@ -584,7 +570,6 @@ 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;
@@ -629,14 +614,6 @@ 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;
-
 	/* Disable INTX and unmask MSI-X */
 	pci_intx_for_msi(dev, 0);
 	pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_MASKALL, 0);
--- 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