luck/tmp_suning_uos_patched
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

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

Browse Source 
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/iommu/intel-iommu.c
View File

@ -3204,7 +3204,9 @@ static int __init init_dmars(void)
if (ret)
goto free_iommu;
iommu_enable_translation(iommu);
if (!translation_pre_enabled(iommu))
iommu_enable_translation(iommu);
iommu_disable_protect_mem_regions(iommu);
}