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bdrv_unref() is a no_coroutine_fn, so calling it from coroutine context is invalid. Use bdrv_co_unref() instead. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20230510203601.418015-7-kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>