From 3d06fca8d2aa3543030e40b95f1d62f9f5a03540 Mon Sep 17 00:00:00 2001
From: Joerg Roedel <joerg.roedel@amd.com>
Date: Thu, 12 Apr 2012 14:12:00 +0200
Subject: [PATCH] iommu/amd: Add workaround for event log erratum

Due to a recent erratum it can happen that the head pointer
of the event-log is updated before the actual event-log
entry is written. This patch implements the recommended
workaround.

Cc: stable@vger.kernel.org	# all stable kernels
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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