diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 0cfed9e28ea1..8310dc2f943b 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1504,7 +1504,7 @@ u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp)
 {
 	u8 pin = *pinp;
 
-	while (dev->bus->self) {
+	while (dev->bus->parent) {
 		pin = pci_swizzle_interrupt_pin(dev, pin);
 		dev = dev->bus->self;
 	}