wfx_tx_queue_empty
if (wait_event_timeout(wvif->wdev->tx_dequeue, wfx_tx_queue_empty(wvif, queue),
WARN_ON(!wfx_tx_queue_empty(wvif, &wvif->tx_queue[i]));
bool wfx_tx_queue_empty(struct wfx_vif *wvif, struct wfx_queue *queue);