openwrt/package/hostapd/patches/500-scan_wait.patch

--- a/src/ap/hostapd.h
+++ b/src/ap/hostapd.h
@@ -271,6 +271,7 @@ struct hostapd_iface {
 	int (*for_each_interface)(struct hapd_interfaces *interfaces,
 				  int (*cb)(struct hostapd_iface *iface,
 					    void *ctx), void *ctx);
+	int (*init_complete)(struct hostapd_iface *iface);
 };
 
 /* hostapd.c */
--- a/src/ap/hostapd.c
+++ b/src/ap/hostapd.c
@@ -784,6 +784,9 @@ int hostapd_setup_interface_complete(str
 	wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
 		   iface->bss[0]->conf->iface);
 
+	if (iface->init_complete)
+		iface->init_complete(iface);
+
 	return 0;
 }
 
--- a/hostapd/main.c
+++ b/hostapd/main.c
@@ -35,6 +35,8 @@
 extern int wpa_debug_level;
 extern int wpa_debug_show_keys;
 extern int wpa_debug_timestamp;
+static int daemonize = 0;
+static char *pid_file = NULL;
 
 
 struct hapd_interfaces {
@@ -162,6 +164,15 @@ static void hostapd_logger_cb(void *ctx,
 }
 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
 
+static int hostapd_init_complete(struct hostapd_iface *iface)
+{
+	if (daemonize && os_daemonize(pid_file)) {
+		perror("daemon");
+		return -1;
+	}
+	daemonize = 0;
+}
+
 
 /**
  * hostapd_init - Allocate and initialize per-interface data
@@ -183,6 +194,7 @@ static struct hostapd_iface * hostapd_in
 	if (hapd_iface == NULL)
 		goto fail;
 
+	hapd_iface->init_complete = hostapd_init_complete;
 	hapd_iface->reload_config = hostapd_reload_config;
 	hapd_iface->config_read_cb = hostapd_config_read;
 	hapd_iface->config_fname = os_strdup(config_file);
@@ -391,7 +403,7 @@ static int hostapd_global_init(struct ha
 }
 
 
-static void hostapd_global_deinit(const char *pid_file)
+static void hostapd_global_deinit(void)
 {
 #ifdef EAP_SERVER_TNC
 	tncs_global_deinit();
@@ -409,8 +421,7 @@ static void hostapd_global_deinit(const 
 }
 
 
-static int hostapd_global_run(struct hapd_interfaces *ifaces, int daemonize,
-			      const char *pid_file)
+static int hostapd_global_run(struct hapd_interfaces *iface)
 {
 #ifdef EAP_SERVER_TNC
 	int tnc = 0;
@@ -431,11 +442,6 @@ static int hostapd_global_run(struct hap
 	}
 #endif /* EAP_SERVER_TNC */
 
-	if (daemonize && os_daemonize(pid_file)) {
-		perror("daemon");
-		return -1;
-	}
-
 	eloop_run();
 
 	return 0;
@@ -479,8 +485,7 @@ int main(int argc, char *argv[])
 	struct hapd_interfaces interfaces;
 	int ret = 1;
 	size_t i;
-	int c, debug = 0, daemonize = 0;
-	char *pid_file = NULL;
+	int c, debug = 0;
 
 	if (os_program_init())
 		return -1;
@@ -545,7 +550,7 @@ int main(int argc, char *argv[])
 			goto out;
 	}
 
-	if (hostapd_global_run(&interfaces, daemonize, pid_file))
+	if (hostapd_global_run(&interfaces))
 		goto out;
 
 	ret = 0;
@@ -556,7 +561,7 @@ int main(int argc, char *argv[])
 		hostapd_interface_deinit_free(interfaces.iface[i]);
 	os_free(interfaces.iface);
 
-	hostapd_global_deinit(pid_file);
+	hostapd_global_deinit();
 	os_free(pid_file);
 
 	os_program_deinit();
--- a/hostapd/config_file.c
+++ b/hostapd/config_file.c
@@ -1882,6 +1882,8 @@ struct hostapd_config * hostapd_config_r
 			}
 #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
@@ -380,6 +380,7 @@ struct hostapd_config {
 
 	int ht_op_mode_fixed;
 	u16 ht_capab;
+	int noscan;
 	int ieee80211n;
 	int secondary_channel;
 };
--- a/src/ap/hw_features.c
+++ b/src/ap/hw_features.c
@@ -460,7 +460,7 @@ static int ieee80211n_check_40mhz(struct
 {
 	struct wpa_driver_scan_params params;
 
-	if (!iface->conf->secondary_channel)
+	if (!iface->conf->secondary_channel || iface->conf->noscan)
 		return 0; /* HT40 not used */
 
 	wpa_printf(MSG_DEBUG, "Scan for neighboring BSSes prior to enabling "