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| author | Kirti Wankhede <kwankhede@nvidia.com> | 2016-12-06 02:38:20 +0530 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2016-12-05 16:04:33 -0700 |
| commit | 3cedd7d75f9ac397d20efa80a3d5f74bb52befcd (patch) | |
| tree | 99bf6b5b1b8250cd7637fe65a68407086d0ff92a /drivers/vfio | |
| parent | 2fc1bec15883537cf8b35fd628cca33ca25736a5 (diff) | |
| download | talos-obmc-linux-3cedd7d75f9ac397d20efa80a3d5f74bb52befcd.tar.gz talos-obmc-linux-3cedd7d75f9ac397d20efa80a3d5f74bb52befcd.zip | |
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: Kirti Wankhede <kwankhede@nvidia.com>
Signed-off-by: Neo Jia <cjia@nvidia.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio')
| -rw-r--r-- | drivers/vfio/vfio_iommu_type1.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index b88ad1e5e7ff..7274fe27ccac 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 vendor driver must unregister notifier */ + WARN_ON(iommu->notifier.head); } static void vfio_iommu_type1_detach_group(void *iommu_data, |
