From: Joerg Roedel <joerg.roedel@amd.com>
Date: Tue, 16 Oct 2012 12:52:51 +0000 (+0200)
Subject: iommu/amd: Work around wrong IOAPIC device-id in IVRS table
X-Git-Tag: v3.7-rc3~31^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c2ff5cf5294bcbd7fa50f7d860e90a66db7e5059;p=pandora-kernel.git

iommu/amd: Work around wrong IOAPIC device-id in IVRS table

On some systems the BIOS puts the wrong device-id for the
IO-APIC into the IVRS table. The result is that interrupt
remapping is not working for the IO-APIC irqs. This usually
means a kernel panic at boot because the timer is not
working.
Fix this kernel panic by disabling interrupt remapping if
this problem is discovered in the IVRS table.

Reported-by: Andrew Oakley <andrew@ado.is-a-geek.net>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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