wil_ring_avail_tx
int used, avail = wil_ring_avail_tx(vring);
int avail = wil_ring_avail_tx(ring);
return wil_ring_avail_tx(ring) < wil_ring_wmark_low(ring);
return wil_ring_avail_tx(ring) > wil_ring_wmark_high(ring);
int used, avail = wil_ring_avail_tx(ring);