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iommu/amd: Allow non-ATS devices in IOMMUv2 domains

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With the grouping of multi-function devices a non-ATS
capable device might also end up in the same domain as an
IOMMUv2 capable device.
So handle this situation gracefully and don't consider it a
bug anymore.

Tested-by: Oded Gabbay <[email protected]>
Signed-off-by: Joerg Roedel <[email protected]>
This commit is contained in:
Joerg Roedel 2015-07-30 11:24:45 +02:00
commit 1c1cc454aa
1 changed files with 6 additions and 1 deletions
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7
drivers/iommu/amd_iommu.c
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@ -3318,7 +3318,12 @@ static int __flush_pasid(struct protection_domain *domain, int pasid,
struct amd_iommu *iommu;
int qdep;
BUG_ON(!dev_data->ats.enabled);
/*
There might be non-IOMMUv2 capable devices in an IOMMUv2
* domain.
*/
if (!dev_data->ats.enabled)
continue;
qdep = dev_data->ats.qdep;
iommu = amd_iommu_rlookup_table[dev_data->devid];