ipw_tx_queue_space
if (ipw_tx_queue_space(q) < q->high_mark)
if (ipw_tx_queue_space(&txq->q) < txq->q.high_mark)
if ((ipw_tx_queue_space(q) > q->low_mark) &&
if (ipw_tx_queue_space(q) < (sync ? 1 : 2)) {