ATH_TID_MAX_BUFS
struct ath_buf *tx_buf[ATH_TID_MAX_BUFS]; /* active tx frames */
cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
INCR(tid->baw_head, ATH_TID_MAX_BUFS);
cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
(ATH_TID_MAX_BUFS - 1))) {
INCR(tid->baw_tail, ATH_TID_MAX_BUFS);