IEEE80211_HT_CAP_AMPDU_FACTOR
pht_cap->ampdu_params_info &= ~(IEEE80211_HT_CAP_AMPDU_FACTOR |
pht_cap->ampdu_params_info |= (IEEE80211_HT_CAP_AMPDU_FACTOR &
max_ampdu_sz = (pht_capie->ampdu_params_info & IEEE80211_HT_CAP_AMPDU_FACTOR);