[PATCH] ioremap balanced with iounmap for drivers/serial/mux.c

ioremap must be balanced by an iounmap and failing to do so can result
in a memory leak.

Signed-off-by: Amol Lad <amol@verismonetworks.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/serial/mux.c b/drivers/serial/mux.c
index 4a1c998..aa819d3 100644
--- a/drivers/serial/mux.c
+++ b/drivers/serial/mux.c
@@ -521,6 +521,8 @@
 
 	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);