usb-serial: fix shutdown / device_unregister order

Ensure that the ->port_remove() callbacks get called before the
->shutdown() callback which makeing the order symmetric with
->attach() being called before ->port_probe().

Signed-off-by: Jim Radford <radford@blackbean.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/usb-serial.c

@@ -135,11 +135,6 @@ static void destroy_serial(struct kref *kref)
 
 	dbg("%s - %s", __FUNCTION__, serial->type->description);
 
-	serial->type->shutdown(serial);
-
-	/* return the minor range that this device had */
-	return_serial(serial);
-
 	for (i = 0; i < serial->num_ports; ++i)
 		serial->port[i]->open_count = 0;
 
@@ -150,6 +145,12 @@ static void destroy_serial(struct kref *kref)
 			serial->port[i] = NULL;
 		}
 
+	if (serial->type->shutdown)
+		serial->type->shutdown(serial);
+
+	/* return the minor range that this device had */
+	return_serial(serial);
+
 	/* If this is a "fake" port, we have to clean it up here, as it will
 	 * not get cleaned up in port_release() as it was never registered with
 	 * the driver core */