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PCI: check if bus has a proper bridge device before triggering SBR 

For devices attached to the root bus, we can't trigger Secondary Bus
Reset because there is no bridge device associated with the bus. So
need to check bus->self again NULL first before using it.

Reviewed-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Yu Zhao 2009-06-26 14:04:46 +08:00 committed by Jesse Barnes
parent 977badb2f3
commit 654b75e044
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/pci.c
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@ -2171,7 +2171,7 @@ static int pci_parent_bus_reset(struct pci_dev *dev, int probe)
u16 ctrl;
struct pci_dev *pdev;
if (dev->subordinate)
if (pci_is_root_bus(dev->bus) || dev->subordinate || !dev->bus->self)
return -ENOTTY;
list_for_each_entry(pdev, &dev->bus->devices, bus_list)