IEEE80211_DATA_LEN 49 include/net/ieee80211.h #define IEEE80211_FRAME_LEN (IEEE80211_DATA_LEN + IEEE80211_HLEN) IEEE80211_DATA_LEN 121 net/ieee80211/ieee80211_module.c if ((new_mtu < 68) || (new_mtu > IEEE80211_DATA_LEN))