AuxXxilium/linux_dsm_epyc7002
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PCI: check if bus has a proper bridge device before triggering SBR

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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)