From: Rob Herring <rob.herring@calxeda.com>
Date: Fri, 30 Aug 2013 21:49:23 +0000 (-0500)
Subject: net: calxedaxgmac: update ring buffer tx_head after barriers
X-Git-Tag: v3.12-rc1~132^2~1^2~14^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ca32723afedd65d612029705446bf44bde5eab14;p=pandora-kernel.git

net: calxedaxgmac: update ring buffer tx_head after barriers

Ensure that the descriptor writes are visible before the ring buffer head
is updated. Since writel is a barrier, we can simply update the head after
the writel.

Reported-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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