From: Jiang Liu <jiang.liu@linux.intel.com>
Date: Fri, 11 Jul 2014 06:19:31 +0000 (+0800)
Subject: iommu/vt-d: Avoid freeing virtual machine domain in free_dmar_iommu()
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~158^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=129ad28100cccc0ff01f2227dd8d0849c0114ade;p=pandora-kernel.git

iommu/vt-d: Avoid freeing virtual machine domain in free_dmar_iommu()

Virtual machine domains are created by intel_iommu_domain_init() and
should be destroyed by intel_iommu_domain_destroy(). So avoid freeing
virtual machine domain data structure in free_dmar_iommu() when
doamin->iommu_count reaches zero, otherwise it may cause invalid
memory access because the IOMMU framework still holds references
to the domain structure.

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

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