PCI: Use for_each_pci_msi_entry() to access MSI device list

Use accessor for_each_pci_msi_entry() to access MSI device list, so we
could easily move msi_list from struct pci_dev into struct device
later.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Reviewed-by: Yijing Wang <wangyijing@huawei.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: xen-devel@lists.xenproject.org
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Stuart Yoder <stuart.yoder@freescale.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Link: http://lkml.kernel.org/r/1436428847-8886-7-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 20 insertions, 19 deletions

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index ab4174243962..540613e5560a 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -131,7 +131,7 @@ int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
         if (type == PCI_CAP_ID_MSI && nvec > 1)
                 return 1;
 
-        list_for_each_entry(entry, &dev->msi_list, list) {
+        for_each_pci_msi_entry(entry, dev) {
                 ret = arch_setup_msi_irq(dev, entry);
                 if (ret < 0)
                         return ret;
@@ -151,7 +151,7 @@ void default_teardown_msi_irqs(struct pci_dev *dev)
         int i;
         struct msi_desc *entry;
 
-        list_for_each_entry(entry, &dev->msi_list, list)
+        for_each_pci_msi_entry(entry, dev)
                 if (entry->irq)
                         for (i = 0; i < entry->nvec_used; i++)
                                 arch_teardown_msi_irq(entry->irq + i);
@@ -168,7 +168,7 @@ static void default_restore_msi_irq(struct pci_dev *dev, int irq)
 
         entry = NULL;
         if (dev->msix_enabled) {
-                list_for_each_entry(entry, &dev->msi_list, list) {
+                for_each_pci_msi_entry(entry, dev) {
                         if (irq == entry->irq)
                                 break;
                 }
@@ -282,7 +282,7 @@ void default_restore_msi_irqs(struct pci_dev *dev)
 {
         struct msi_desc *entry;
 
-        list_for_each_entry(entry, &dev->msi_list, list)
+        for_each_pci_msi_entry(entry, dev)
                 default_restore_msi_irq(dev, entry->irq);
 }
 
@@ -363,21 +363,22 @@ EXPORT_SYMBOL_GPL(pci_write_msi_msg);
 
 static void free_msi_irqs(struct pci_dev *dev)
 {
+        struct list_head *msi_list = dev_to_msi_list(&dev->dev);
         struct msi_desc *entry, *tmp;
         struct attribute **msi_attrs;
         struct device_attribute *dev_attr;
         int i, count = 0;
 
-        list_for_each_entry(entry, &dev->msi_list, list)
+        for_each_pci_msi_entry(entry, dev)
                 if (entry->irq)
                         for (i = 0; i < entry->nvec_used; i++)
                                 BUG_ON(irq_has_action(entry->irq + i));
 
         pci_msi_teardown_msi_irqs(dev);
 
-        list_for_each_entry_safe(entry, tmp, &dev->msi_list, list) {
+        list_for_each_entry_safe(entry, tmp, msi_list, list) {
                 if (entry->msi_attrib.is_msix) {
-                        if (list_is_last(&entry->list, &dev->msi_list))
+                        if (list_is_last(&entry->list, msi_list))
                                 iounmap(entry->mask_base);
                 }
 
@@ -448,7 +449,7 @@ static void __pci_restore_msix_state(struct pci_dev *dev)
 
         if (!dev->msix_enabled)
                 return;
-        BUG_ON(list_empty(&dev->msi_list));
+        BUG_ON(list_empty(dev_to_msi_list(&dev->dev)));
 
         /* route the table */
         pci_intx_for_msi(dev, 0);
@@ -456,7 +457,7 @@ static void __pci_restore_msix_state(struct pci_dev *dev)
                                 PCI_MSIX_FLAGS_ENABLE | PCI_MSIX_FLAGS_MASKALL);
 
         arch_restore_msi_irqs(dev);
-        list_for_each_entry(entry, &dev->msi_list, list)
+        for_each_pci_msi_entry(entry, dev)
                 msix_mask_irq(entry, entry->masked);
 
         pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_MASKALL, 0);
@@ -501,7 +502,7 @@ static int populate_msi_sysfs(struct pci_dev *pdev)
         int count = 0;
 
         /* Determine how many msi entries we have */
-        list_for_each_entry(entry, &pdev->msi_list, list)
+        for_each_pci_msi_entry(entry, pdev)
                 ++num_msi;
         if (!num_msi)
                 return 0;
@@ -510,7 +511,7 @@ static int populate_msi_sysfs(struct pci_dev *pdev)
         msi_attrs = kzalloc(sizeof(void *) * (num_msi + 1), GFP_KERNEL);
         if (!msi_attrs)
                 return -ENOMEM;
-        list_for_each_entry(entry, &pdev->msi_list, list) {
+        for_each_pci_msi_entry(entry, pdev) {
                 msi_dev_attr = kzalloc(sizeof(*msi_dev_attr), GFP_KERNEL);
                 if (!msi_dev_attr)
                         goto error_attrs;
@@ -599,7 +600,7 @@ static int msi_verify_entries(struct pci_dev *dev)
 {
         struct msi_desc *entry;
 
-        list_for_each_entry(entry, &dev->msi_list, list) {
+        for_each_pci_msi_entry(entry, dev) {
                 if (!dev->no_64bit_msi || !entry->msg.address_hi)
                         continue;
                 dev_err(&dev->dev, "Device has broken 64-bit MSI but arch"
@@ -636,7 +637,7 @@ static int msi_capability_init(struct pci_dev *dev, int nvec)
         mask = msi_mask(entry->msi_attrib.multi_cap);
         msi_mask_irq(entry, mask, mask);
 
-        list_add_tail(&entry->list, &dev->msi_list);
+        list_add_tail(&entry->list, dev_to_msi_list(&dev->dev));
 
         /* Configure MSI capability structure */
         ret = pci_msi_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSI);
@@ -713,7 +714,7 @@ static int msix_setup_entries(struct pci_dev *dev, void __iomem *base,
                 entry->mask_base                = base;
                 entry->nvec_used                = 1;
 
-                list_add_tail(&entry->list, &dev->msi_list);
+                list_add_tail(&entry->list, dev_to_msi_list(&dev->dev));
         }
 
         return 0;
@@ -725,7 +726,7 @@ static void msix_program_entries(struct pci_dev *dev,
         struct msi_desc *entry;
         int i = 0;
 
-        list_for_each_entry(entry, &dev->msi_list, list) {
+        for_each_pci_msi_entry(entry, dev) {
                 int offset = entries[i].entry * PCI_MSIX_ENTRY_SIZE +
                                                 PCI_MSIX_ENTRY_VECTOR_CTRL;
 
@@ -806,7 +807,7 @@ out_avail:
                 struct msi_desc *entry;
                 int avail = 0;
 
-                list_for_each_entry(entry, &dev->msi_list, list) {
+                for_each_pci_msi_entry(entry, dev) {
                         if (entry->irq != 0)
                                 avail++;
                 }
@@ -895,8 +896,8 @@ void pci_msi_shutdown(struct pci_dev *dev)
         if (!pci_msi_enable || !dev || !dev->msi_enabled)
                 return;
 
-        BUG_ON(list_empty(&dev->msi_list));
-        desc = list_first_entry(&dev->msi_list, struct msi_desc, list);
+        BUG_ON(list_empty(dev_to_msi_list(&dev->dev)));
+        desc = first_msi_entry(dev);
 
         pci_msi_set_enable(dev, 0);
         pci_intx_for_msi(dev, 1);
@@ -1001,7 +1002,7 @@ void pci_msix_shutdown(struct pci_dev *dev)
                 return;
 
         /* Return the device with MSI-X masked as initial states */
-        list_for_each_entry(entry, &dev->msi_list, list) {
+        for_each_pci_msi_entry(entry, dev) {
                 /* Keep cached states to be restored */
                 __pci_msix_desc_mask_irq(entry, 1);
         }