Index: ati_pcigart.c
===================================================================
--- ati_pcigart.c	(revision 207069)
+++ ati_pcigart.c	(working copy)
@@ -220,6 +220,8 @@
 	ret = 1;
 
     done:
+	if (gart_info->gart_reg_if == DRM_ATI_GART_IGP)
+		DRM_MEMORYBARRIER();
 	gart_info->addr = address;
 	gart_info->bus_addr = bus_address;
 	return ret;