diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index 9b6b6023193bcb29ea7390d83b8eab91cae8412b..dde7caac7f9ff01f94201748fe7615d0c6e37949 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -872,6 +872,8 @@ void intel_gtt_insert_sg_entries(struct sg_table *st,
 		}
 	}
 	wmb();
+	if (intel_private.driver->chipset_flush)
+		intel_private.driver->chipset_flush();
 }
 EXPORT_SYMBOL(intel_gtt_insert_sg_entries);