[126/205] USB: g_serial: fix tty cleanup on unload

From: Greg KH
Date: Fri Jul 30 2010 - 14:18:52 EST

2.6.34-stable review patch. If anyone has any objections, please let us know.


From: Jon Povey <jon.povey@xxxxxxxxxxxxxxx>

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@xxxxxxxxxxxxxxx>
Acked-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

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
@@ -1184,6 +1184,7 @@ void gserial_cleanup(void)
n_ports = 0;

+ put_tty_driver(gs_tty_driver);
gs_tty_driver = NULL;

pr_debug("%s: cleaned up ttyGS* support\n", __func__);

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