diff --git a/[refs] b/[refs]
index 2bdbc2b1ae8a..1b30140cd547 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9f9ab46d557c32b9cad49c31d094d659ec3b59c0
+refs/heads/master: e4dcdd6b4fa33efee94e89cccd75e871c570c510
diff --git a/trunk/arch/x86/kernel/pci-nommu_64.c b/trunk/arch/x86/kernel/pci-nommu_64.c
index a4e8ccfae4cb..1da9cf9be3aa 100644
--- a/trunk/arch/x86/kernel/pci-nommu_64.c
+++ b/trunk/arch/x86/kernel/pci-nommu_64.c
@@ -32,6 +32,7 @@ nommu_map_single(struct device *hwdev, phys_addr_t paddr, size_t size,
 	dma_addr_t bus = paddr;
 	if (!check_addr("map_single", hwdev, bus, size))
 				return bad_dma_address;
+	flush_write_buffers();
 	return bus;
 }
 
@@ -64,6 +65,7 @@ static int nommu_map_sg(struct device *hwdev, struct scatterlist *sg,
 			return 0;
 		s->dma_length = s->length;
 	}
+	flush_write_buffers();
 	return nents;
 }