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PCI: fix wrong assumption in pci_get_interrupt_pin

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Current pci_get_interrupt_pin() seems to have an assumption that
pci_bus->self is NULL on the root pci bus. But it might not be true on
some platforms. Because of this wrong assumption, current
pci_get_interrupt_pin() might cause endless loop. We must check
pci_bus->parent instead.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Kenji Kaneshige 2009-02-17 14:15:45 +09:00 committed by Jesse Barnes
parent f92d4e29d7
commit c2a3072e01
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/pci.c
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@ -1484,7 +1484,7 @@ pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge)
if (!pin)
return -1;
while (dev->bus->self) {
while (dev->bus->parent) {
pin = pci_swizzle_interrupt_pin(dev, pin);
dev = dev->bus->self;
}