From: Joerg Roedel <joerg.roedel@amd.com>
Date: Thu, 31 May 2012 15:38:11 +0000 (+0200)
Subject: iommu/amd: Cache pdev pointer to root-bridge
X-Git-Tag: v3.5-rc2~22^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c1bf94ec1e12d76838ad485158aecf208ebd8fb9;p=pandora-kernel.git

iommu/amd: Cache pdev pointer to root-bridge

At some point pci_get_bus_and_slot started to enable
interrupts. Since this function is used in the
amd_iommu_resume path it will enable interrupts on resume
which causes a warning. The fix will use a cached pointer
to the root-bridge to re-enable the IOMMU in case the BIOS
is broken.

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