From 18e35e081e1bb129c6dc5a5874c260a613cd13d7 Mon Sep 17 00:00:00 2001
From: Malcolm Priestley <tvboxspy@gmail.com>
Date: Sun, 22 Sep 2013 20:15:58 +0100
Subject: [PATCH] staging: vt6656: rxtx.c [BUG] s_vGetFreeContext dead lock on
 null apTD.

There seems to be race condition that the device is ndo_start_xmit
at a point where the device is closing and apTD is NULL resulting
in dead lock.

Add a NULL check to apTD and return NULL to calling functions.

This is more likely on 64 bit systems.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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