1 files changed, 55 insertions, 30 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index c3ce3d61091c..7325d43bf030 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -108,12 +108,12 @@ static bool pcie_ari_disabled;
  */
 unsigned char pci_bus_max_busnr(struct pci_bus* bus)
 {
-	struct list_head *tmp;
+	struct pci_bus *tmp;
 	unsigned char max, n;
 
 	max = bus->busn_res.end;
-	list_for_each(tmp, &bus->children) {
-		n = pci_bus_max_busnr(pci_bus_b(tmp));
+	list_for_each_entry(tmp, &bus->children, node) {
+		n = pci_bus_max_busnr(tmp);
 		if(n > max)
 			max = n;
 	}
@@ -1193,6 +1193,8 @@ int __weak pcibios_enable_device(struct pci_dev *dev, int bars)
 static int do_pci_enable_device(struct pci_dev *dev, int bars)
 {
 	int err;
+	u16 cmd;
+	u8 pin;
 
 	err = pci_set_power_state(dev, PCI_D0);
 	if (err < 0 && err != -EIO)
@@ -1202,6 +1204,17 @@ static int do_pci_enable_device(struct pci_dev *dev, int bars)
 		return err;
 	pci_fixup_device(pci_fixup_enable, dev);
 
+	if (dev->msi_enabled || dev->msix_enabled)
+		return 0;
+
+	pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
+	if (pin) {
+		pci_read_config_word(dev, PCI_COMMAND, &cmd);
+		if (cmd & PCI_COMMAND_INTX_DISABLE)
+			pci_write_config_word(dev, PCI_COMMAND,
+					      cmd & ~PCI_COMMAND_INTX_DISABLE);
+	}
+
 	return 0;
 }
 
@@ -1623,29 +1636,27 @@ static void pci_pme_list_scan(struct work_struct *work)
 	struct pci_pme_device *pme_dev, *n;
 
 	mutex_lock(&pci_pme_list_mutex);
-	if (!list_empty(&pci_pme_list)) {
-		list_for_each_entry_safe(pme_dev, n, &pci_pme_list, list) {
-			if (pme_dev->dev->pme_poll) {
-				struct pci_dev *bridge;
-
-				bridge = pme_dev->dev->bus->self;
-				/*
-				 * If bridge is in low power state, the
-				 * configuration space of subordinate devices
-				 * may be not accessible
-				 */
-				if (bridge && bridge->current_state != PCI_D0)
-					continue;
-				pci_pme_wakeup(pme_dev->dev, NULL);
-			} else {
-				list_del(&pme_dev->list);
-				kfree(pme_dev);
-			}
+	list_for_each_entry_safe(pme_dev, n, &pci_pme_list, list) {
+		if (pme_dev->dev->pme_poll) {
+			struct pci_dev *bridge;
+
+			bridge = pme_dev->dev->bus->self;
+			/*
+			 * If bridge is in low power state, the
+			 * configuration space of subordinate devices
+			 * may be not accessible
+			 */
+			if (bridge && bridge->current_state != PCI_D0)
+				continue;
+			pci_pme_wakeup(pme_dev->dev, NULL);
+		} else {
+			list_del(&pme_dev->list);
+			kfree(pme_dev);
 		}
-		if (!list_empty(&pci_pme_list))
-			schedule_delayed_work(&pci_pme_work,
-					      msecs_to_jiffies(PME_TIMEOUT));
 	}
+	if (!list_empty(&pci_pme_list))
+		schedule_delayed_work(&pci_pme_work,
+				      msecs_to_jiffies(PME_TIMEOUT));
 	mutex_unlock(&pci_pme_list_mutex);
 }
 
@@ -2192,21 +2203,18 @@ void pci_request_acs(void)
 }
 
 /**
- * pci_enable_acs - enable ACS if hardware support it
+ * pci_std_enable_acs - enable ACS on devices using standard ACS capabilites
  * @dev: the PCI device
  */
-void pci_enable_acs(struct pci_dev *dev)
+static int pci_std_enable_acs(struct pci_dev *dev)
 {
 	int pos;
 	u16 cap;
 	u16 ctrl;
 
-	if (!pci_acs_enable)
-		return;
-
 	pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ACS);
 	if (!pos)
-		return;
+		return -ENODEV;
 
 	pci_read_config_word(dev, pos + PCI_ACS_CAP, &cap);
 	pci_read_config_word(dev, pos + PCI_ACS_CTRL, &ctrl);
@@ -2224,6 +2232,23 @@ void pci_enable_acs(struct pci_dev *dev)
 	ctrl |= (cap & PCI_ACS_UF);
 
 	pci_write_config_word(dev, pos + PCI_ACS_CTRL, ctrl);
+
+	return 0;
+}
+
+/**
+ * pci_enable_acs - enable ACS if hardware support it
+ * @dev: the PCI device
+ */
+void pci_enable_acs(struct pci_dev *dev)
+{
+	if (!pci_acs_enable)
+		return;
+
+	if (!pci_std_enable_acs(dev))
+		return;
+
+	pci_dev_specific_enable_acs(dev);
 }
 
 static bool pci_acs_flags_enabled(struct pci_dev *pdev, u16 acs_flags)