PCI: Fix pci cardbus removal

During test busn_res allocation with cardbus, found pci card removal is not
working anymore, and it turns out it is broken by:

|commit 79cc9601c3e42b4f0650fe7e69132ebce7ab48f9
|Date:   Tue Nov 22 21:06:53 2011 -0800
|
|    PCI: Only call pci_stop_bus_device() one time for child devices at remove

The above changed the behavior of pci_remove_behind_bridge that
yenta_cardbus depended on.  So restore the old behavoir of
pci_remove_behind_bridge (which requires stopping and removing of all
devices) by:

1. rename pci_remove_behind_bridge to __pci_remove_behind_bridge, and let
   __pci_remove_bus_device() call it instead.
2. add pci_stop_behind_bridge that will stop devices behind a bridge
3. add back pci_remove_behind_bridge that will stop and remove devices
   under bridge.

-v2: update commit description a little bit.

Tested-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 22 insertions, 6 deletions

diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
index 6def3624c688..ef8b18c48f26 100644
--- a/drivers/pci/remove.c
+++ b/drivers/pci/remove.c
@@ -77,6 +77,7 @@ void pci_remove_bus(struct pci_bus *pci_bus)
 }
 EXPORT_SYMBOL(pci_remove_bus);
 
+static void __pci_remove_behind_bridge(struct pci_dev *dev);
 /**
  * pci_remove_bus_device - remove a PCI device and any children
  * @dev: the device to remove
@@ -94,7 +95,7 @@ static void __pci_remove_bus_device(struct pci_dev *dev)
         if (dev->subordinate) {
                 struct pci_bus *b = dev->subordinate;
 
-                pci_remove_behind_bridge(dev);
+                __pci_remove_behind_bridge(dev);
                 pci_remove_bus(b);
                 dev->subordinate = NULL;
         }
@@ -107,6 +108,24 @@ void pci_remove_bus_device(struct pci_dev *dev)
         __pci_remove_bus_device(dev);
 }
 
+static void __pci_remove_behind_bridge(struct pci_dev *dev)
+{
+        struct list_head *l, *n;
+
+        if (dev->subordinate)
+                list_for_each_safe(l, n, &dev->subordinate->devices)
+                        __pci_remove_bus_device(pci_dev_b(l));
+}
+
+static void pci_stop_behind_bridge(struct pci_dev *dev)
+{
+        struct list_head *l, *n;
+
+        if (dev->subordinate)
+                list_for_each_safe(l, n, &dev->subordinate->devices)
+                        pci_stop_bus_device(pci_dev_b(l));
+}
+
 /**
  * pci_remove_behind_bridge - remove all devices behind a PCI bridge
  * @dev: PCI bridge device
@@ -117,11 +136,8 @@ void pci_remove_bus_device(struct pci_dev *dev)
  */
 void pci_remove_behind_bridge(struct pci_dev *dev)
 {
-        struct list_head *l, *n;
-
-        if (dev->subordinate)
-                list_for_each_safe(l, n, &dev->subordinate->devices)
-                        __pci_remove_bus_device(pci_dev_b(l));
+        pci_stop_behind_bridge(dev);
+        __pci_remove_behind_bridge(dev);
 }
 
 static void pci_stop_bus_devices(struct pci_bus *bus)