rpma_conn_delete - delete already closed connection
int rpma_conn_delete(struct rpma_conn **conn_ptr);
rpma_conn_delete() deletes already closed connection.
The rpma_conn_delete() function returns 0 on success or a negative error
code on failure. rpma_conn_delete() sets *conn_ptr value to NULL on
success and on failure.
rpma_conn_delete() can fail with the following errors:
- RPMA_E_INVAL - conn_ptr is NULL
- RPMA_E_PROVIDER - ibv_destroy_cq() or rdma_destroy_id()