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iommu/vt-d: Simplify check in identity_mapping() 

commit 1ddb32da4a upstream.

The function only has one call-site and there it is never called with
dummy or deferred devices. Simplify the check in the function to
account for that.

Fixes: 1ee0186b9a ("iommu/vt-d: Refactor find_domain() helper")
Cc: stable@vger.kernel.org # v5.5
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Chen Zhuo <sagazchen@tencent.com>
Signed-off-by: Xinghui Li <korantli@tencent.com>
This commit is contained in:
Joerg Roedel 2020-02-17 17:29:55 +01:00 committed by Jianping Liu
parent 70708f558d
commit f752b1577d
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/intel-iommu.c
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@ -2923,7 +2923,7 @@ static int identity_mapping(struct device *dev)
struct device_domain_info *info;
info = dev->archdata.iommu;
if (info && info != DUMMY_DEVICE_DOMAIN_INFO && info != DEFER_DEVICE_DOMAIN_INFO)
if (info)
return (info->domain == si_domain);
return 0;