smcr_link_put
smcr_link_put(conn->lnk);
smcr_link_put(conn->lnk); /* link_hold in smc_conn_create() */
smcr_link_put(lnk); /* theoretically last link_put */
smcr_link_put(lnk);
smcr_link_put(link); /* smcr_link_hold by schedulers of link_down_work */
void smcr_link_put(struct smc_link *lnk);