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authorYinghai Lu <yinghai@kernel.org>2012-02-04 22:55:00 -0800
committerJesse Barnes <jbarnes@virtuousgeek.org>2012-02-10 12:19:31 -0800
commit3682a3946d2b0bad621db871e3bead83e523a238 (patch)
tree22fa013f268abeb35863ac7be2016912c4977762
parent8161fe91d8da34c1a231b6e2d4454b4b3179a5d4 (diff)
downloadop-kernel-dev-3682a3946d2b0bad621db871e3bead83e523a238.zip
op-kernel-dev-3682a3946d2b0bad621db871e3bead83e523a238.tar.gz
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>
-rw-r--r--drivers/pci/remove.c28
1 files changed, 22 insertions, 6 deletions
diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
index 6def362..ef8b18c 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)
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