ieee80211_ch_switch_timing
const struct ieee80211_ch_switch_timing *ch_sw_timing;
if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
struct ieee80211_ch_switch_timing *ch_sw;
*buf++ = sizeof(struct ieee80211_ch_switch_timing);
2 + sizeof(struct ieee80211_ch_switch_timing)];
int extra_ies_len = 2 + sizeof(struct ieee80211_ch_switch_timing);
u8 extra_ies[2 + sizeof(struct ieee80211_ch_switch_timing)];