diff --git a/[refs] b/[refs]
index 697c6e6bcf74..da71130126c4 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c765d4cad977f7e454a53d5bca5a942156b2d94c
+refs/heads/master: 4208978ec4f0d6001facf95be9defccf1a0bf313
diff --git a/trunk/drivers/usb/gadget/serial.c b/trunk/drivers/usb/gadget/serial.c
index f5c3896b1d95..433b3f44f42e 100644
--- a/trunk/drivers/usb/gadget/serial.c
+++ b/trunk/drivers/usb/gadget/serial.c
@@ -2163,8 +2163,7 @@ static void gs_free_ports(struct gs_dev *dev)
 				port->port_dev = NULL;
 				wake_up_interruptible(&port->port_write_wait);
 				if (port->port_tty) {
-					wake_up_interruptible(&port->port_tty->read_wait);
-					wake_up_interruptible(&port->port_tty->write_wait);
+					tty_hangup(port->port_tty);
 				}
 				spin_unlock_irqrestore(&port->port_lock, flags);
 			} else {