ATH_MAX_SCATTER
"tx", sc->sc_tx_desclen, ath_txbuf, ATH_MAX_SCATTER);
ATH_MAX_SCATTER, /* nsegments */
bf->bf_nseg = ATH_MAX_SCATTER + 1;
if (bf->bf_nseg > ATH_MAX_SCATTER) { /* too many desc's, linearize */
m = m_collapse(m0, M_NOWAIT, ATH_MAX_SCATTER);
KASSERT(bf->bf_nseg <= ATH_MAX_SCATTER,
bus_dma_segment_t bf_segs[ATH_MAX_SCATTER];