From: Alexander Duyck <alexander.h.duyck@intel.com>
Date: Tue, 8 Jan 2013 07:01:03 +0000 (+0000)
Subject: igb: Replace rmb in Tx cleanup with read_barrier_depends
X-Git-Tag: v3.9-rc1~139^2~320^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=70d289bcef24eca45dadf2f10fe79a936589216e;p=pandora-kernel.git

igb: Replace rmb in Tx cleanup with read_barrier_depends

The rmb in the Tx cleanup path is a much stronger barrier than we really need.
All that is really needed is a read_barrier_depends since the location of the
EOP descriptor is dependent on the eop_desc value.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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