From: Jiang Liu <jiang.liu@linux.intel.com>
Date: Sun, 9 Nov 2014 14:47:59 +0000 (+0800)
Subject: iommu/vt-d: Search for ACPI _DSM method for DMAR hotplug
X-Git-Tag: omap-for-v3.19/fixes-rc1~23^2~41
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d35165a955f095095cdb8512cb7cd8f63101649a;p=pandora-kernel.git

iommu/vt-d: Search for ACPI _DSM method for DMAR hotplug

According to Intel VT-d specification, _DSM method to support DMAR
hotplug should exist directly under corresponding ACPI object
representing PCI host bridge. But some BIOSes doesn't conform to
this, so search for _DSM method in the subtree starting from the
ACPI object representing the PCI host bridge.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Reviewed-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---

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