PCI: fix wrong assumption in pci_get_interrupt_pin
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>
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 0b3e20f..0cfed9e 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1484,7 +1484,7 @@
if (!pin)
return -1;
- while (dev->bus->self) {
+ while (dev->bus->parent) {
pin = pci_swizzle_interrupt_pin(dev, pin);
dev = dev->bus->self;
}