diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 28ce3a7..35086e8 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -55,9 +55,10 @@
 	list_for_each_entry(dev, &bus->devices, bus_list) {
 		u16 class = dev->class >> 8;
 
-		/* Don't touch classless devices and host bridges.  */
+		/* Don't touch classless devices or host bridges or ioapics.  */
 		if (class == PCI_CLASS_NOT_DEFINED ||
-		    class == PCI_CLASS_BRIDGE_HOST)
+		    class == PCI_CLASS_BRIDGE_HOST ||
+		    class == PCI_CLASS_SYSTEM_PIC)
 			continue;
 
 		pdev_sort_resources(dev, &head);