From: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Date: Fri, 30 May 2014 16:40:07 +0000 (-0300)
Subject: net: mvneta: Avoid unmapping the TSO header buffers
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~36^2~94^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2e3173a3d38bbb5e29a6a734e7366855c12efbe9;p=pandora-kernel.git

net: mvneta: Avoid unmapping the TSO header buffers

The buffers for the TSO headers belong to a DMA coherent region which is
allocated at ndo_open() time, and released at ndo_stop() time.

Therefore, and contrary to the TSO payload descriptor buffers, the TSO header
buffers don't need to be unmapped. This commit adds a check to detect a
TSO header buffer and explicitly prevent the unmap.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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