bf_seqno
bf->bf_seqno = tid->seq_next;
ba_index = ATH_BA_INDEX(seq_st, bf->bf_seqno);
index = ATH_BA_INDEX(tid->seq_start, bf->bf_seqno);
arn_tx_update_baw(sc, tid, bf->bf_seqno);
if (ATH_BA_ISSET(ba, ATH_BA_INDEX(seq_st, bf->bf_seqno))) {
arn_tx_update_baw(sc, tid, bf->bf_seqno);
if (!BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno)) {
arn_tx_update_baw(sc, txtid, bf->bf_seqno);