Commit 1c1cc454 authored Jul 30, 2015 by Joerg Roedel

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



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 <oded.gabbay@gmail.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

parent 52717828

drivers/iommu/amd_iommu.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -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];