ATH_TXMAXTRY
an->an_tx_try0 = ATH_TXMAXTRY; /* max tries at rate 0 */
rates[0].count = ATH_TXMAXTRY;
try0 = ATH_TXMAXTRY;
try0 = ATH_TXMAXTRY;
if (try0 != ATH_TXMAXTRY)
an->an_tx_try0 = ATH_TXMAXTRY; /* max tries at rate 0 */