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39a369c341
This tests the flow to tombstone vdevice when idevice is to be unbound before vdevice destruction. The expected results of the tombstone are: - The vdevice ID can't be reused anymore (not tested in this patch). - Even ioctl(IOMMU_DESTROY) can't free the vdevice ID. - iommufd_fops_release() can still free everything. Link: https://patch.msgid.link/r/20250716070349.1807226-8-yilun.xu@linux.intel.com Reviewed-by: Nicolin Chen <nicolinc@nvidia.com> Tested-by: Nicolin Chen <nicolinc@nvidia.com> Signed-off-by: Xu Yilun <yilun.xu@linux.intel.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>