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Commit 3cedd7d7 authored by Kirti Wankhede's avatar Kirti Wankhede Committed by Alex Williamson
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vfio iommu type1: WARN_ON if notifier block is not unregistered 



mdev vendor driver should unregister the iommu notifier since the vfio
iommu can persist beyond the attachment of the mdev group. WARN_ON will
show warning if vendor driver doesn't unregister the notifier and is
forced to follow the implementations steps.

Signed-off-by: default avatarKirti Wankhede <kwankhede@nvidia.com>
Signed-off-by: default avatarNeo Jia <cjia@nvidia.com>
Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
parent 2fc1bec1

drivers/vfio/vfio_iommu_type1.c

+2 −0
Original line number Diff line number Diff line
@@ -1361,6 +1361,8 @@ static void vfio_sanity_check_pfn_list(struct vfio_iommu *iommu) 
		if (WARN_ON(!RB_EMPTY_ROOT(&dma->pfn_list)))

			break;

	}

	/* mdev vendor driver must unregister notifier */

	WARN_ON(iommu->notifier.head);

}



static void vfio_iommu_type1_detach_group(void *iommu_data,