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The split follows the pairing with the destroy functions: - vfio_group_get_device_fd() destroyed by close() - vfio_device_open() destroyed by vfio_device_fops_release() - vfio_device_assign_container() destroyed by vfio_group_try_dissolve_container() The next patch will put a lock around vfio_device_assign_container(). Reviewed-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Tested-by: Nicolin Chen <nicolinc@nvidia.com> Tested-by: Matthew Rosato <mjrosato@linux.ibm.com> Link: https://lore.kernel.org/r/3-v2-d035a1842d81+1bf-vfio_group_locking_jgg@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>