X-Git-Url: http://git.alex.org.uk

diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index cc274fd..38d7ebd 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/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;
@@ -1083,6 +1089,8 @@ int usb_serial_probe(struct usb_interface *interface,
 		}
 	}
 
+	serial->disconnected = 0;
+
 	usb_serial_console_init(debug, minor);
 
 exit: