[PATCH 7/8] PCI: fix wrong assumption in pci_get_interrupt_pin

[Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>]

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>

---
 drivers/pci/pci.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6.29-rc2/drivers/pci/pci.c
===================================================================
--- linux-2.6.29-rc2.orig/drivers/pci/pci.c
+++ linux-2.6.29-rc2/drivers/pci/pci.c
@@ -1433,7 +1433,7 @@ pci_get_interrupt_pin(struct pci_dev *de
 	if (!pin)
 		return -1;
 
-	while (dev->bus->self) {
+	while (dev->bus->parent) {
 		pin = pci_swizzle_interrupt_pin(dev, pin);
 		dev = dev->bus->self;
 	}