diff -urN drm.org/linux-core/drmP.h drm/linux-core/drmP.h
--- drm.org/linux-core/drmP.h	2008-04-09 09:35:23.000000000 +0200
+++ drm/linux-core/drmP.h	2008-04-09 09:37:01.000000000 +0200
@@ -906,7 +906,7 @@
 #ifdef __alpha__
 #define drm_get_pci_domain(dev) dev->hose->index
 #else
-#define drm_get_pci_domain(dev) 0
+#define drm_get_pci_domain(dev) pci_domain_nr(dev->pdev->bus)
 #endif
 
 #if __OS_HAS_AGP