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Subject[097/140] USB: g_serial: fix tty cleanup on unload
2.6.33-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Jon Povey <jon.povey@racelogic.co.uk>

commit b23097b793081358a6d943263c91bae4c955c4e3 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/usb/gadget/u_serial.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/usb/gadget/u_serial.c
+++ b/drivers/usb/gadget/u_serial.c
@@ -1183,6 +1183,7 @@ 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__);



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