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authorKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>2008-10-17 09:23:51 +0900
committerJesse Barnes <jbarnes@virtuousgeek.org>2008-10-23 14:40:06 -0700
commitd2174c3c07adad88dd9ba37a731e0b00b746822a (patch)
tree3904a0174a0238a3425dbf9a204f05f5112ef376
parent5f4f0c4d3fc95cb7d509e4469a22aed40532f0fc (diff)
downloadlinux-linaro-d2174c3c07adad88dd9ba37a731e0b00b746822a.tar.gz
PCI hotplug: cpqphp: fix kernel NULL pointer dereference
The following patch fixes the regression in 2.6.27 that causes kernel NULL pointer dereference at cpqphp driver probe time. This patch should be backported to the .27 stable series. Seems to have been introduced by f46753c5e354b857b20ab8e0fe7b2579831dc369. The root cause of this problem seems that cpqphp driver calls pci_hp_register() wrongly. In current implementation, cpqphp driver passes 'ctrl->pci_dev->subordinate' as a second parameter for pci_hp_register(). But because hotplug slots and it's hotplug controller (exists as a pci funcion) are on the same bus, it should be 'ctrl->pci_dev->bus' instead. Cc: <stable@kernel.org> Tested-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
-rw-r--r--drivers/pci/hotplug/cpqphp_core.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/hotplug/cpqphp_core.c b/drivers/pci/hotplug/cpqphp_core.c
index 724d42c4adb..8514c3a1746 100644
--- a/drivers/pci/hotplug/cpqphp_core.c
+++ b/drivers/pci/hotplug/cpqphp_core.c
@@ -433,7 +433,7 @@ static int ctrl_slot_setup(struct controller *ctrl,
slot->number, ctrl->slot_device_offset,
slot_number);
result = pci_hp_register(hotplug_slot,
- ctrl->pci_dev->subordinate,
+ ctrl->pci_dev->bus,
slot->device,
name);
if (result) {