Merge commit 'v2.6.30' into next

2 files changed, 26 insertions, 38 deletions

diff --git a/drivers/pci/hotplug/acpiphp.h b/drivers/pci/hotplug/acpiphp.h
index 4fc168b7009..e68d5f20ffb 100644
--- a/drivers/pci/hotplug/acpiphp.h
+++ b/drivers/pci/hotplug/acpiphp.h
@@ -129,7 +129,6 @@ struct acpiphp_func {
         struct acpiphp_bridge *bridge;  /* Ejectable PCI-to-PCI bridge */
 
         struct list_head sibling;
-        struct pci_dev *pci_dev;
         struct notifier_block nb;
         acpi_handle     handle;
 
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index a33794d9e0d..3a6064bce56 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -32,9 +32,6 @@
 
 /*
  * Lifetime rules for pci_dev:
- *  - The one in acpiphp_func has its refcount elevated by pci_get_slot()
- *    when the driver is loaded or when an insertion event occurs.  It loses
- *    a refcount when its ejected or the driver unloads.
  *  - The one in acpiphp_bridge has its refcount elevated by pci_get_slot()
  *    when the bridge is scanned and it loses a refcount when the bridge
  *    is removed.
@@ -130,6 +127,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
         unsigned long long adr, sun;
         int device, function, retval;
         struct pci_bus *pbus = bridge->pci_bus;
+        struct pci_dev *pdev;
 
         if (!acpi_pci_check_ejectable(pbus, handle) && !is_dock_device(handle))
                 return AE_OK;
@@ -213,10 +211,10 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
         newfunc->slot = slot;
         list_add_tail(&newfunc->sibling, &slot->funcs);
 
-        /* associate corresponding pci_dev */
-        newfunc->pci_dev = pci_get_slot(pbus, PCI_DEVFN(device, function));
-        if (newfunc->pci_dev) {
+        pdev = pci_get_slot(pbus, PCI_DEVFN(device, function));
+        if (pdev) {
                 slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON);
+                pci_dev_put(pdev);
         }
 
         if (is_dock_device(handle)) {
@@ -617,7 +615,6 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge)
                                 if (ACPI_FAILURE(status))
                                         err("failed to remove notify handler\n");
                         }
-                        pci_dev_put(func->pci_dev);
                         list_del(list);
                         kfree(func);
                 }
@@ -1101,22 +1098,24 @@ static int __ref enable_device(struct acpiphp_slot *slot)
         pci_enable_bridges(bus);
         pci_bus_add_devices(bus);
 
-        /* associate pci_dev to our representation */
         list_for_each (l, &slot->funcs) {
                 func = list_entry(l, struct acpiphp_func, sibling);
-                func->pci_dev = pci_get_slot(bus, PCI_DEVFN(slot->device,
-                                                        func->function));
-                if (!func->pci_dev)
+                dev = pci_get_slot(bus, PCI_DEVFN(slot->device,
+                                                  func->function));
+                if (!dev)
                         continue;
 
-                if (func->pci_dev->hdr_type != PCI_HEADER_TYPE_BRIDGE &&
-                    func->pci_dev->hdr_type != PCI_HEADER_TYPE_CARDBUS)
+                if (dev->hdr_type != PCI_HEADER_TYPE_BRIDGE &&
+                    dev->hdr_type != PCI_HEADER_TYPE_CARDBUS) {
+                        pci_dev_put(dev);
                         continue;
+                }
 
                 status = find_p2p_bridge(func->handle, (u32)1, bus, NULL);
                 if (ACPI_FAILURE(status))
                         warn("find_p2p_bridge failed (error code = 0x%x)\n",
                                 status);
+                pci_dev_put(dev);
         }
 
         slot->flags |= SLOT_ENABLED;
@@ -1142,17 +1141,14 @@ static void disable_bridges(struct pci_bus *bus)
  */
 static int disable_device(struct acpiphp_slot *slot)
 {
-        int retval = 0;
         struct acpiphp_func *func;
-        struct list_head *l;
+        struct pci_dev *pdev;
 
         /* is this slot already disabled? */
         if (!(slot->flags & SLOT_ENABLED))
                 goto err_exit;
 
-        list_for_each (l, &slot->funcs) {
-                func = list_entry(l, struct acpiphp_func, sibling);
-
+        list_for_each_entry(func, &slot->funcs, sibling) {
                 if (func->bridge) {
                         /* cleanup p2p bridges under this P2P bridge */
                         cleanup_p2p_bridge(func->bridge->handle,
@@ -1160,35 +1156,28 @@ static int disable_device(struct acpiphp_slot *slot)
                         func->bridge = NULL;
                 }
 
-                if (func->pci_dev) {
-                        pci_stop_bus_device(func->pci_dev);
-                        if (func->pci_dev->subordinate) {
-                                disable_bridges(func->pci_dev->subordinate);
-                                pci_disable_device(func->pci_dev);
+                pdev = pci_get_slot(slot->bridge->pci_bus,
+                                    PCI_DEVFN(slot->device, func->function));
+                if (pdev) {
+                        pci_stop_bus_device(pdev);
+                        if (pdev->subordinate) {
+                                disable_bridges(pdev->subordinate);
+                                pci_disable_device(pdev);
                         }
+                        pci_remove_bus_device(pdev);
+                        pci_dev_put(pdev);
                 }
         }
 
-        list_for_each (l, &slot->funcs) {
-                func = list_entry(l, struct acpiphp_func, sibling);
-
+        list_for_each_entry(func, &slot->funcs, sibling) {
                 acpiphp_unconfigure_ioapics(func->handle);
                 acpiphp_bus_trim(func->handle);
-                /* try to remove anyway.
-                 * acpiphp_bus_add might have been failed */
-
-                if (!func->pci_dev)
-                        continue;
-
-                pci_remove_bus_device(func->pci_dev);
-                pci_dev_put(func->pci_dev);
-                func->pci_dev = NULL;
         }
 
         slot->flags &= (~SLOT_ENABLED);
 
- err_exit:
-        return retval;
+err_exit:
+        return 0;
 }