Messages in this thread Patch in this message | | | From | Joerg Roedel <> | Subject | [PATCH] iommu/amd: Allow non-ATS devices in IOMMUv2 domains | Date | Thu, 30 Jul 2015 12:05:24 +0200 |
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From: Joerg Roedel <jroedel@suse.de>
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.
Signed-off-by: Joerg Roedel <jroedel@suse.de> --- drivers/iommu/amd_iommu.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index fa9508b..658ee39 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -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]; -- 1.9.1
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