From: Jiang Liu <jiang.liu@linux.intel.com>
Date: Fri, 20 Jun 2014 07:08:06 +0000 (+0800)
Subject: iommu/vt-d: fix bug in handling multiple RMRRs for the same PCI device
X-Git-Tag: omap-for-v3.16/fixes-rc4~40^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=27e249501ca06a3010519c306206cc402b61b5ab;p=pandora-kernel.git

iommu/vt-d: fix bug in handling multiple RMRRs for the same PCI device

Function dmar_iommu_notify_scope_dev() makes a wrong assumption that
there's one RMRR for each PCI device at most, which causes DMA failure
on some HP platforms. So enhance dmar_iommu_notify_scope_dev() to
handle multiple RMRRs for the same PCI device.

Fixbug: https://bugzilla.novell.com/show_bug.cgi?id=879482

Cc: <stable@vger.kernel.org> # 3.15
Reported-by: Tom Mingarelli <thomas.mingarelli@hp.com>
Tested-by: Linda Knippers <linda.knippers@hp.com>
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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