diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 9d2aa6366fd047622df85c4dcc56c6d0160a791e..c824dc8d617cb52f7b3305f5f4748a1ba89536f7 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1421,6 +1421,26 @@ pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge)
 	return pin;
 }
 
+/**
+ * pci_common_swizzle - swizzle INTx all the way to root bridge
+ * @dev: the PCI device
+ * @pinp: pointer to the INTx pin value (1=INTA, 2=INTB, 3=INTD, 4=INTD)
+ *
+ * Perform INTx swizzling for a device.  This traverses through all PCI-to-PCI
+ * bridges all the way up to a PCI root bus.
+ */
+u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp)
+{
+	u8 pin = *pinp;
+
+	while (dev->bus->self) {
+		pin = pci_swizzle_interrupt_pin(dev, pin);
+		dev = dev->bus->self;
+	}
+	*pinp = pin;
+	return PCI_SLOT(dev->devfn);
+}
+
 /**
  *	pci_release_region - Release a PCI bar
  *	@pdev: PCI device whose resources were previously reserved by pci_request_region
diff --git a/include/linux/pci.h b/include/linux/pci.h
index da1c22bab40edf562c8f6560f99248f489c1e4c5..170f9ae2d8a03561d2fa9ea28adc7ae606e7fbd7 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -545,6 +545,7 @@ struct resource *pci_find_parent_resource(const struct pci_dev *dev,
 					  struct resource *res);
 u8 pci_swizzle_interrupt_pin(struct pci_dev *dev, u8 pin);
 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
+u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
 extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
 extern void pci_dev_put(struct pci_dev *dev);
 extern void pci_remove_bus(struct pci_bus *b);