From: Larry Finger <Larry.Finger@lwfinger.net>
Date: Wed, 31 Dec 2014 03:33:07 +0000 (-0600)
Subject: rtlwifi: Fix error when accessing unmapped memory in skb
X-Git-Tag: fixes-v4.0-rc1~296^2~19^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e9538cf4f90713eca71b1d6a74b4eae1d445c664;p=pandora-kernel.git

rtlwifi: Fix error when accessing unmapped memory in skb

These drivers use 9100-byte receive buffers, thus allocating an skb requires
an O(3) memory allocation. Under heavy memory loads and fragmentation, such
a request can fail. Previous versions of the driver have dropped the packet
and reused the old buffer; however, the new version introduced a bug in that
it released the old buffer before trying to allocate a new one. The previous
method is implemented here. The skb is unmapped before any attempt is made to
allocate another.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org>  [v3.18]
Reported-by: Eric Biggers <ebiggers3@gmail.com>
Cc: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---

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