From: Chris Wright <chrisw@sous-sol.org>
Date: Mon, 15 Jun 2009 13:53:45 +0000 (+0200)
Subject: amd-iommu: disable cmd buffer and evt logging before reprogramming iommu
X-Git-Tag: v2.6.31-rc1~97^2~16^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a8c485bb6857811807d42f9fd1fde2f5f89cc5c9;p=pandora-kernel.git

amd-iommu: disable cmd buffer and evt logging before reprogramming iommu

The IOMMU spec states that IOMMU behavior may be undefined when the
IOMMU registers are rewritten while command or event buffer is enabled.
Disable them in IOMMU disable path.

Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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