diff --git a/[refs] b/[refs]
index babdc447a4a9..85c2abb82012 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7e63d0c453aa3fae714bc679f6768203b5dc9c32
+refs/heads/master: 054f2346cb0e524cbb678759bfedabfdba4d0100
diff --git a/trunk/drivers/usb/serial/mct_u232.c b/trunk/drivers/usb/serial/mct_u232.c
index d501aefa2628..ad4998bbf16f 100644
--- a/trunk/drivers/usb/serial/mct_u232.c
+++ b/trunk/drivers/usb/serial/mct_u232.c
@@ -566,10 +566,13 @@ static void mct_u232_read_int_callback(struct urb *urb)
 	 * Work-a-round: handle the 'usual' bulk-in pipe here
 	 */
 	if (urb->transfer_buffer_length > 2) {
-		tty = tty_port_tty_get(&port->port);
 		if (urb->actual_length) {
-			tty_insert_flip_string(tty, data, urb->actual_length);
-			tty_flip_buffer_push(tty);
+			tty = tty_port_tty_get(&port->port);
+			if (tty) {
+				tty_insert_flip_string(tty, data,
+						urb->actual_length);
+				tty_flip_buffer_push(tty);
+			}
 			tty_kref_put(tty);
 		}
 		goto exit;