ATH_BUFTYPE_NORMAL
ATH_BUFTYPE_MGMT : ATH_BUFTYPE_NORMAL);
bf = _ath_getbuf_locked(sc, ATH_BUFTYPE_NORMAL);
bf = ath_getbuf(sc, ATH_BUFTYPE_NORMAL);
bf = _ath_getbuf_locked(sc, ATH_BUFTYPE_NORMAL);