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: Kirti Wankhede <kwankhede@xxxxxxxxxx> Signed-off-by: Neo Jia <cjia@xxxxxxxxxx> Change-Id: I75fd0a40e582a144fe7a037c7140d3513e8ff030 --- drivers/vfio/vfio_iommu_type1.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 023fba7b8d5a..37871ee0c0c5 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -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 venfor driver must unregister notifier */ + WARN_ON(iommu->notifier.head); } static void vfio_iommu_type1_detach_group(void *iommu_data, -- 2.7.0 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
