From: Joerg Roedel <joerg.roedel@amd.com>
Date: Fri, 1 Jun 2012 13:20:23 +0000 (+0200)
Subject: iommu/amd: Fix deadlock in ppr-handling error path
X-Git-Tag: v3.5-rc2~22^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eee53537c476c947bf7faa1c916d2f5a0ae8ec93;p=pandora-kernel.git

iommu/amd: Fix deadlock in ppr-handling error path

In the error path of the ppr_notifer it can happen that the
iommu->lock is taken recursivly. This patch fixes the
problem by releasing the iommu->lock before any notifier is
invoked. This also requires to move the erratum workaround
for the ppr-log (interrupt may be faster than data in the log)
one function up.

Cc: stable@vger.kernel.org # v3.3, v3.4
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---

Reading git-diff-tree failed