diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index ea41f262..a1ca9b7b 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -2271,7 +2271,8 @@
 		}
 
 		if (up->port.flags & UPF_IOREMAP) {
-			up->port.membase = ioremap(up->port.mapbase, size);
+			up->port.membase = ioremap_nocache(up->port.mapbase,
+									size);
 			if (!up->port.membase) {
 				release_mem_region(up->port.mapbase, size);
 				ret = -ENOMEM;