diff --git a/[refs] b/[refs]
index 9ef3369412c4..530d42c29ba2 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1c27ae671e6b465e04544450276c88f4dba8de60
+refs/heads/master: 331879fd6f584d60327ba802616d41bfa636b873
diff --git a/trunk/drivers/usb/serial/usb-serial.c b/trunk/drivers/usb/serial/usb-serial.c
index 9a2617845dfc..73172898ccb3 100644
--- a/trunk/drivers/usb/serial/usb-serial.c
+++ b/trunk/drivers/usb/serial/usb-serial.c
@@ -204,6 +204,11 @@ static int serial_open (struct tty_struct *tty, struct file *filp)
 		goto bailout_kref_put;
 	}
 
+	if (port->serial->disconnected) {
+		retval = -ENODEV;
+		goto bailout_kref_put;
+	}
+
 	if (mutex_lock_interruptible(&port->mutex)) {
 		retval = -ERESTARTSYS;
 		goto bailout_kref_put;