AR5K_QCU_TXD
if (AR5K_REG_READ_Q(ah, AR5K_QCU_TXD, queue))
AR5K_REG_WRITE_Q(ah, AR5K_QCU_TXD, queue);
ath5k_hw_reg_write(ah, 0, AR5K_QCU_TXD);
#define AR5K_DISABLE_QUEUE(_q) AR5K_QCU_GLOBAL_WRITE(AR5K_QCU_TXD, _q)
#define AR5K_QUEUE_DISABLED(_q) AR5K_QCU_GLOBAL_READ(AR5K_QCU_TXD, _q)