diff --git a/[refs] b/[refs]
index dd0f11d69c63..0c3794003c9a 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 980373b7918b8023be6b7df03857f494ae124d0b
+refs/heads/master: c371de14b9a23aadb57accab0ca2e5dd28de7f16
diff --git a/trunk/drivers/usb/serial/usb-serial.c b/trunk/drivers/usb/serial/usb-serial.c
index ada400d6594b..456881620727 100644
--- a/trunk/drivers/usb/serial/usb-serial.c
+++ b/trunk/drivers/usb/serial/usb-serial.c
@@ -1093,6 +1093,7 @@ static void usb_serial_disconnect(struct usb_interface *interface)
 				tty_kref_put(tty);
 			}
 			usb_serial_port_poison_urbs(port);
+			wake_up_interruptible(&port->port.delta_msr_wait);
 			cancel_work_sync(&port->work);
 			if (device_is_registered(&port->dev))
 				device_del(&port->dev);