Unregistering nvme_cuse when the device did not exist
resulted in SEGFAULT within nvme_io_msg_ctrlr_unregister().
To prevent that, when no nvme_cuse is registered for the
ctrlr do not unregister nvme_io_msg_producer.
RPC and spdk_nvme_cuse_unregister() now return an error.
Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Change-Id: Id77cebe23ff91023a24cfe091f5f62a76a9175fd
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/1921
Community-CI: Mellanox Build Bot
Community-CI: Broadcom CI
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
d9a11fd5b1