MIPS: BCM47XX: check length of serial console array

Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6310/

arch/mips/bcm47xx/serial.c

@@ -31,7 +31,8 @@ static int __init uart8250_init_ssb(void)
 
 	memset(&uart8250_data, 0,  sizeof(uart8250_data));
 
-	for (i = 0; i < mcore->nr_serial_ports; i++) {
+	for (i = 0; i < mcore->nr_serial_ports &&
+		    i < ARRAY_SIZE(uart8250_data) - 1; i++) {
 		struct plat_serial8250_port *p = &(uart8250_data[i]);
 		struct ssb_serial_port *ssb_port = &(mcore->serial_ports[i]);
 
@@ -55,7 +56,8 @@ static int __init uart8250_init_bcma(void)
 
 	memset(&uart8250_data, 0,  sizeof(uart8250_data));
 
-	for (i = 0; i < cc->nr_serial_ports; i++) {
+	for (i = 0; i < cc->nr_serial_ports &&
+		    i < ARRAY_SIZE(uart8250_data) - 1; i++) {
 		struct plat_serial8250_port *p = &(uart8250_data[i]);
 		struct bcma_serial_port *bcma_port;
 		bcma_port = &(cc->serial_ports[i]);