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. Reviewd-by: Kenji Kaneshige <kaneshige.kenji@xxxxxxxxxxxxxx> Signed-off-by: Yu Zhao <yu.zhao@xxxxxxxxx> --- drivers/pci/pci.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 6c93af5..d5d6f56 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -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) -- 1.6.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
