diff --git a/[refs] b/[refs]
index 8549eec81373..a398b9b44c1b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a141a04330bd6eadf7081a0860dc786be7d09c46
+refs/heads/master: af907dc8cd4157d629e48533b3400786467340d5
diff --git a/trunk/drivers/serial/mux.c b/trunk/drivers/serial/mux.c
index 4a1c9983f38f..aa819d3f8ee5 100644
--- a/trunk/drivers/serial/mux.c
+++ b/trunk/drivers/serial/mux.c
@@ -521,6 +521,8 @@ static void __exit mux_exit(void)
 
 	for (i = 0; i < port_cnt; i++) {
 		uart_remove_one_port(&mux_driver, &mux_ports[i]);
+		if (mux_ports[i].membase)
+			iounmap(mux_ports[i].membase);
 	}
 
 	uart_unregister_driver(&mux_driver);