From 054f2346cb0e524cbb678759bfedabfdba4d0100 Mon Sep 17 00:00:00 2001
From: Jiri Slaby <jirislaby@gmail.com>
Date: Sun, 6 Sep 2009 23:10:10 +0200
Subject: [PATCH] tty: USB: serial/mct_u232, fix tty refcnt

Stanse found a tty refcnt leak in read_int_callback. In fact
it's handled wrong altogether. tty_port_tty_get can return NULL
and it's not checked in that manner.

Fix that by checking the tty_port_tty_get retval and put tty kref
properly.

http://stanse.fi.muni.cz/

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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