#ifdef CONFIG_CARL9170FW_TX_AMPDU
/* tx aggregate scheduling */
struct carl9170_tx_superframe *ampdu_prev[__AR9170_NUM_TX_QUEUES];
#ifdef CONFIG_CARL9170FW_TX_AMPDU
/* tx aggregate scheduling */
struct carl9170_tx_superframe *ampdu_prev[__AR9170_NUM_TX_QUEUES];