From b23097b793081358a6d943263c91bae4c955c4e3 Mon Sep 17 00:00:00 2001
From: Jon Povey <jon.povey@racelogic.co.uk>
Date: Mon, 14 Jun 2010 19:42:10 +0900
Subject: [PATCH] USB: g_serial: fix tty cleanup on unload

Call put_tty_driver() in cleanup function, to fix Oops when trying to open
gadget serial char device after module unload.

Signed-off-by: Jon Povey <jon.povey@racelogic.co.uk>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/usb/gadget/u_serial.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/gadget/u_serial.c b/drivers/usb/gadget/u_serial.c
index a0f79df4c6c2..3e8dcb5455e3 100644
--- a/drivers/usb/gadget/u_serial.c
+++ b/drivers/usb/gadget/u_serial.c
@@ -1184,6 +1184,7 @@ void gserial_cleanup(void)
 	n_ports = 0;
 
 	tty_unregister_driver(gs_tty_driver);
+	put_tty_driver(gs_tty_driver);
 	gs_tty_driver = NULL;
 
 	pr_debug("%s: cleaned up ttyGS* support\n", __func__);
-- 
2.20.1