diff --git a/wpa_supplicant/ap.c b/wpa_supplicant/ap.c
index 7ecf7a8..bfb69fc 100644
--- a/wpa_supplicant/ap.c
+++ b/wpa_supplicant/ap.c
@@ -1156,6 +1156,7 @@
 }
 
 
+#ifdef CONFIG_CTRL_IFACE
 int ap_ctrl_iface_chanswitch(struct wpa_supplicant *wpa_s, const char *pos)
 {
 	struct csa_settings settings;
@@ -1166,6 +1167,7 @@
 
 	return ap_switch_channel(wpa_s, &settings);
 }
+#endif /* CONFIG_CTRL_IFACE */
 
 
 void wpas_ap_ch_switch(struct wpa_supplicant *wpa_s, int freq, int ht,
@@ -1265,6 +1267,7 @@
 #endif /* CONFIG_WPS_NFC */
 
 
+#ifdef CONFIG_CTRL_IFACE
 int wpas_ap_stop_ap(struct wpa_supplicant *wpa_s)
 {
 	struct hostapd_data *hapd;
@@ -1274,6 +1277,7 @@
 	hapd = wpa_s->ap_iface->bss[0];
 	return hostapd_ctrl_iface_stop_ap(hapd);
 }
+#endif /* CONFIG_CTRL_IFACE */
 
 
 #ifdef NEED_AP_MLME
diff --git a/wpa_supplicant/config.c b/wpa_supplicant/config.c
index c690542..fb539cc 100644
--- a/wpa_supplicant/config.c
+++ b/wpa_supplicant/config.c
@@ -1296,6 +1296,7 @@
 }
 
 
+#ifndef NO_CONFIG_WRITE
 static char * wpa_config_write_eap(const struct parse_data *data,
 				   struct wpa_ssid *ssid)
 {
@@ -1329,6 +1330,7 @@
 
 	return buf;
 }
+#endif /* NO_CONFIG_WRITE */
 
 
 static int wpa_config_parse_password(const struct parse_data *data,
@@ -1411,6 +1413,7 @@
 }
 
 
+#ifndef NO_CONFIG_WRITE
 static char * wpa_config_write_password(const struct parse_data *data,
 					struct wpa_ssid *ssid)
 {
@@ -1444,6 +1447,7 @@
 
 	return buf;
 }
+#endif /* NO_CONFIG_WRITE */
 #endif /* IEEE8021X_EAPOL */
 
 
@@ -2517,6 +2521,9 @@
  */
 char ** wpa_config_get_all(struct wpa_ssid *ssid, int get_keys)
 {
+#ifdef NO_CONFIG_WRITE
+	return NULL;
+#else /* NO_CONFIG_WRITE */
 	const struct parse_data *field;
 	char *key, *value;
 	size_t i;
@@ -2562,6 +2569,7 @@
 		os_free(value++);
 	os_free(props);
 	return NULL;
+#endif /* NO_CONFIG_WRITE */
 }
 
 
diff --git a/wpa_supplicant/ctrl_iface.c b/wpa_supplicant/ctrl_iface.c
index 377b9ed..d48ac8a 100644
--- a/wpa_supplicant/ctrl_iface.c
+++ b/wpa_supplicant/ctrl_iface.c
@@ -8593,10 +8593,17 @@
 		pos = os_strchr(pos, '\t');
 		if (pos)
 			*pos++ = '\0';
+		if (!extra[0])
+			break;
+
 		if (os_strcmp(extra, "create") == 0)
 			create_iface = 1;
-		else
+		else {
+			wpa_printf(MSG_DEBUG,
+				   "INTERFACE_ADD unsupported extra parameter: '%s'",
+				   extra);
 			return -1;
+		}
 	} while (0);
 
 	if (create_iface) {
diff --git a/wpa_supplicant/dbus/dbus_new_handlers.c b/wpa_supplicant/dbus/dbus_new_handlers.c
index f2e62ca..66ee32f 100644
--- a/wpa_supplicant/dbus/dbus_new_handlers.c
+++ b/wpa_supplicant/dbus/dbus_new_handlers.c
@@ -3791,6 +3791,7 @@
 	struct wpabuf *wps_ie;
 #endif /* CONFIG_WPS */
 	DBusMessageIter iter_dict, variant_iter;
+	int wps_support = 0;
 	const char *type = "";
 
 	res = get_bss_helper(args, error, __func__);
@@ -3805,6 +3806,7 @@
 #ifdef CONFIG_WPS
 	wps_ie = wpa_bss_get_vendor_ie_multi(res, WPS_IE_VENDOR_TYPE);
 	if (wps_ie) {
+		wps_support = 1;
 		if (wps_is_selected_pbc_registrar(wps_ie))
 			type = "pbc";
 		else if (wps_is_selected_pin_registrar(wps_ie))
@@ -3814,7 +3816,7 @@
 	}
 #endif /* CONFIG_WPS */
 
-	if (!wpa_dbus_dict_append_string(&iter_dict, "Type", type) ||
+	if ((wps_support && !wpa_dbus_dict_append_string(&iter_dict, "Type", type)) ||
 	    !wpa_dbus_dict_close_write(&variant_iter, &iter_dict) ||
 	    !dbus_message_iter_close_container(iter, &variant_iter))
 		goto nomem;