openwrtv4/package/network/services/hostapd/patches/340-reload_freq_change.patch

--- a/src/ap/hostapd.c
+++ b/src/ap/hostapd.c
@@ -76,6 +76,16 @@ static void hostapd_reload_bss(struct ho
 #endif /* CONFIG_NO_RADIUS */
 
 	ssid = &hapd->conf->ssid;
+
+	hostapd_set_freq(hapd, hapd->iconf->hw_mode, hapd->iface->freq,
+			 hapd->iconf->channel,
+			 hapd->iconf->ieee80211n,
+			 hapd->iconf->ieee80211ac,
+			 hapd->iconf->secondary_channel,
+			 hapd->iconf->vht_oper_chwidth,
+			 hapd->iconf->vht_oper_centr_freq_seg0_idx,
+			 hapd->iconf->vht_oper_centr_freq_seg1_idx);
+
 	if (!ssid->wpa_psk_set && ssid->wpa_psk && !ssid->wpa_psk->next &&
 	    ssid->wpa_passphrase_set && ssid->wpa_passphrase) {
 		/*
@@ -175,21 +185,12 @@ int hostapd_reload_config(struct hostapd
 	oldconf = hapd->iconf;
 	iface->conf = newconf;
 
+	if (iface->conf->channel)
+		iface->freq = hostapd_hw_get_freq(hapd, iface->conf->channel);
+
 	for (j = 0; j < iface->num_bss; j++) {
 		hapd = iface->bss[j];
 		hapd->iconf = newconf;
-		hapd->iconf->channel = oldconf->channel;
-		hapd->iconf->acs = oldconf->acs;
-		hapd->iconf->secondary_channel = oldconf->secondary_channel;
-		hapd->iconf->ieee80211n = oldconf->ieee80211n;
-		hapd->iconf->ieee80211ac = oldconf->ieee80211ac;
-		hapd->iconf->ht_capab = oldconf->ht_capab;
-		hapd->iconf->vht_capab = oldconf->vht_capab;
-		hapd->iconf->vht_oper_chwidth = oldconf->vht_oper_chwidth;
-		hapd->iconf->vht_oper_centr_freq_seg0_idx =
-			oldconf->vht_oper_centr_freq_seg0_idx;
-		hapd->iconf->vht_oper_centr_freq_seg1_idx =
-			oldconf->vht_oper_centr_freq_seg1_idx;
 		hapd->conf = newconf->bss[j];
 		hostapd_reload_bss(hapd);
 	}