openwrt/package/network/services/hostapd/patches/300-noscan.patch

--- a/hostapd/config_file.c
+++ b/hostapd/config_file.c
@@ -2639,6 +2639,8 @@ static int hostapd_config_fill(struct ho
 		}
 #endif /* CONFIG_IEEE80211W */
 #ifdef CONFIG_IEEE80211N
+	} else if (os_strcmp(buf, "noscan") == 0) {
+		conf->noscan = atoi(pos);
 	} else if (os_strcmp(buf, "ieee80211n") == 0) {
 		conf->ieee80211n = atoi(pos);
 	} else if (os_strcmp(buf, "ht_capab") == 0) {
--- a/src/ap/ap_config.h
+++ b/src/ap/ap_config.h
@@ -576,6 +576,7 @@ struct hostapd_config {
 
 	int ht_op_mode_fixed;
 	u16 ht_capab;
+	int noscan;
 	int ieee80211n;
 	int secondary_channel;
 	int require_ht;
--- a/src/ap/hw_features.c
+++ b/src/ap/hw_features.c
@@ -690,7 +690,7 @@ static int ieee80211n_check_40mhz(struct
 	struct wpa_driver_scan_params params;
 	int ret;
 
-	if (!iface->conf->secondary_channel)
+	if (!iface->conf->secondary_channel || iface->conf->noscan)
 		return 0; /* HT40 not used */
 
 	hostapd_set_state(iface, HAPD_IFACE_HT_SCAN);
--- a/src/ap/ieee802_11_ht.c
+++ b/src/ap/ieee802_11_ht.c
@@ -221,6 +221,9 @@ void hostapd_2040_coex_action(struct hos
 	if (!(iface->conf->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
 		return;
 
+	if (iface->conf->noscan)
+		return;
+
 	hdr_len = data - (u8 *) mgmt;
 	if (hdr_len > len)
 		return;
@@ -319,6 +322,9 @@ void ht40_intolerant_add(struct hostapd_
 	if (iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
 		return;
 
+	if (iface->conf->noscan)
+		return;
+
 	wpa_printf(MSG_INFO, "HT: Forty MHz Intolerant is set by STA " MACSTR
 		   " in Association Request", MAC2STR(sta->addr));