PCI: use pci_is_root_bus() in pci_common_swizzle()

Use pci_is_root_bus() in pci_common_swizzle() for checking if the pci
bus is root, for code consistency.

Reviewed-by: Alex Chiang <achiang@hp.com>
Reviewed-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 70b3b44a8b6c..8ea911e55722 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1549,7 +1549,7 @@ u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp)
 {
         u8 pin = *pinp;
 
-        while (dev->bus->parent) {
+        while (!pci_is_root_bus(dev->bus)) {
                 pin = pci_swizzle_interrupt_pin(dev, pin);
                 dev = dev->bus->self;
         }