xen/pci: Check for PCI bridge before using it.

Some SR-IOV devices may use more than one bus number, but there is no real bridges
because that have internal routing mechanism. So need to check whether the bridge is
existing before using it.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Zhang, Yang Z 2012-05-22 08:40:16 +00:00 коммит произвёл Konrad Rzeszutek Wilk
Родитель 5e152e6c4b
Коммит 780dbcd0ee
1 изменённых файлов: 1 добавлений и 1 удалений

Просмотреть файл

@ -59,7 +59,7 @@ static int xen_add_device(struct device *dev)
#ifdef CONFIG_ACPI
handle = DEVICE_ACPI_HANDLE(&pci_dev->dev);
if (!handle)
if (!handle && pci_dev->bus->bridge)
handle = DEVICE_ACPI_HANDLE(pci_dev->bus->bridge);
#ifdef CONFIG_PCI_IOV
if (!handle && pci_dev->is_virtfn)