Index: tree0/drivers/pci/quirks.c
===================================================================
--- tree0.orig/drivers/pci/quirks.c
+++ tree0/drivers/pci/quirks.c
@@ -1761,6 +1761,7 @@ static void __devinit quirk_disable_msi(
 	}
 }
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_disable_msi);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x5a3f, quirk_disable_msi); /* RS480 PCI bridge */
 
 /* Go through the list of Hypertransport capabilities and
  * return 1 if a HT MSI capability is found and enabled */