IOCB_BUSY
} else if (iocb_stat == IOCB_BUSY) {
} else if (rc == IOCB_BUSY) {
return IOCB_BUSY;
return IOCB_BUSY;
} else if (retval == IOCB_BUSY) {
if (ret && ret != IOCB_BUSY) {
if (txq_cnt == 0 || ret == IOCB_BUSY)