diff --git a/[refs] b/[refs]
index 7c0b23bf613c..56667b8cb77c 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b446b96fd11b69b7c4ecd47d869cff9094fd8802
+refs/heads/master: a65a6f14dc24a90bde3f5d0073ba2364476200bf
diff --git a/trunk/drivers/usb/serial/usb-serial.c b/trunk/drivers/usb/serial/usb-serial.c
index 5413bd500781..97355a15bbea 100644
--- a/trunk/drivers/usb/serial/usb-serial.c
+++ b/trunk/drivers/usb/serial/usb-serial.c
@@ -1059,6 +1059,12 @@ int usb_serial_probe(struct usb_interface *interface,
 		serial->attached = 1;
 	}
 
+	/* Avoid race with tty_open and serial_install by setting the
+	 * disconnected flag and not clearing it until all ports have been
+	 * registered.
+	 */
+	serial->disconnected = 1;
+
 	if (get_free_serial(serial, num_ports, &minor) == NULL) {
 		dev_err(&interface->dev, "No more free serial devices\n");
 		goto probe_error;
@@ -1078,6 +1084,8 @@ int usb_serial_probe(struct usb_interface *interface,
 				"continuing\n");
 	}
 
+	serial->disconnected = 0;
+
 	usb_serial_console_init(debug, minor);
 
 exit: