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iommu/vt-d: Enable Translation only if it was previously disabled 

Do not touch the TE bit unless we know translation is
disabled.

Tested-by: ZhenHua Li <zhen-hual@hp.com>
Tested-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2015-06-12 14:40:01 +02:00
parent 60b523ecfe
commit 8939ddf6d6
1 changed files with 3 additions and 1 deletions
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4
drivers/iommu/intel-iommu.c
View File

@ -3204,7 +3204,9 @@ domains_done:
if (ret)
goto free_iommu;
iommu_enable_translation(iommu);
if (!translation_pre_enabled(iommu))
iommu_enable_translation(iommu);
iommu_disable_protect_mem_regions(iommu);
}