From: Yogesh Ashok Powar <yogeshp@marvell.com>
Date: Wed, 13 Jul 2011 12:12:06 +0000 (+0530)
Subject: mwl8k: Fixing sta dereference when ieee80211_tx_info->control.sta is NULL
X-Git-Tag: v3.1-rc1~255^2~14^2^2~109
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=16c929df0895e6f52f4a0f17683d709f5fef95d8;p=pandora-kernel.git

mwl8k: Fixing sta dereference when ieee80211_tx_info->control.sta is NULL

Following oops was seen on SMP machine

>BUG: unable to handle kernel NULL pointer dereference at 00000012
>IP: [<f8c56691>] mwl8k_tx+0x20e/0x561 [mwl8k]
>*pde = 00000000
>Oops: 0000 [#1] SMP
>Modules linked in: mwl8k mac80211 cfg80211 [last unloaded: cfg80211]

As ieee80211_tx_info->control.sta may be NULL during ->tx call, avoiding sta
dereference in such scenario with the following patch.

Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

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