diff --git a/src/drivers/driver_nl80211_scan.c b/src/drivers/driver_nl80211_scan.c
index 966c3fb..dd1993c 100644
--- a/src/drivers/driver_nl80211_scan.c
+++ b/src/drivers/driver_nl80211_scan.c
@@ -132,6 +132,8 @@
 				goto fail;
 		}
 		nla_nest_end(msg, ssids);
+	} else {
+		wpa_printf(MSG_DEBUG, "nl80211: Passive scan requested");
 	}
 
 	if (params->extra_ies) {
diff --git a/src/p2p/p2p_invitation.c b/src/p2p/p2p_invitation.c
index 108e5b7..70da15a 100644
--- a/src/p2p/p2p_invitation.c
+++ b/src/p2p/p2p_invitation.c
@@ -284,7 +284,7 @@
 
 		if (!p2p_channels_includes(&intersection, reg_class, channel))
 		{
-			p2p_dbg(p2p, "forced freq %d MHz not in the supported channels interaction",
+			p2p_dbg(p2p, "forced freq %d MHz not in the supported channels intersection",
 				op_freq);
 			status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
 			goto fail;
diff --git a/wpa_supplicant/ctrl_iface.c b/wpa_supplicant/ctrl_iface.c
index 9538c51..6113db6 100644
--- a/wpa_supplicant/ctrl_iface.c
+++ b/wpa_supplicant/ctrl_iface.c
@@ -6905,6 +6905,7 @@
 	}
 
 	eloop_cancel_timeout(wpas_network_reenabled, wpa_s, NULL);
+	wpa_s->wnmsleep_used = 0;
 }
 
 
diff --git a/wpa_supplicant/dbus/dbus_new.c b/wpa_supplicant/dbus/dbus_new.c
index 16bada9..1bbfe49 100644
--- a/wpa_supplicant/dbus/dbus_new.c
+++ b/wpa_supplicant/dbus/dbus_new.c
@@ -3069,6 +3069,14 @@
 	  }
 	},
 #endif /* CONFIG_TDLS */
+#ifndef CONFIG_NO_CONFIG_WRITE
+	{ "SaveConfig", WPAS_DBUS_NEW_IFACE_INTERFACE,
+	  (WPADBusMethodHandler) wpas_dbus_handler_save_config,
+	  {
+		  END_ARGS
+	  }
+	},
+#endif /* CONFIG_NO_CONFIG_WRITE */
 	{ NULL, NULL, NULL, { END_ARGS } }
 };
 
diff --git a/wpa_supplicant/dbus/dbus_new_handlers.c b/wpa_supplicant/dbus/dbus_new_handlers.c
index 0504f31..fbfcdc9 100644
--- a/wpa_supplicant/dbus/dbus_new_handlers.c
+++ b/wpa_supplicant/dbus/dbus_new_handlers.c
@@ -435,7 +435,8 @@
 
 	for (i = 0; i < array_len; i++) {
 		if (!dbus_message_iter_append_basic(&array_iter, type,
-						    (char *)array + i * element_size)) {
+						    (const char *) array +
+						    i * element_size)) {
 			dbus_set_error(error, DBUS_ERROR_FAILED,
 				       "%s: failed to construct message 2.5",
 				       __func__);
@@ -1877,7 +1878,7 @@
 	os_free(iface);
 	return reply;
 #else /* IEEE8021X_EAPOL */
-	wpa_printf(MSG_DEBUG, "CTRL_IFACE: 802.1X not included");
+	wpa_printf(MSG_DEBUG, "dbus: 802.1X not included");
 	return wpas_dbus_error_unknown_error(message, "802.1X not included");
 #endif /* IEEE8021X_EAPOL */
 }
@@ -2294,6 +2295,35 @@
 #endif /* CONFIG_TDLS */
 
 
+#ifndef CONFIG_NO_CONFIG_WRITE
+/**
+ * wpas_dbus_handler_save_config - Save configuration to configuration file
+ * @message: Pointer to incoming dbus message
+ * @wpa_s: wpa_supplicant structure for a network interface
+ * Returns: NULL on Success, Otherwise errror message
+ *
+ * Handler function for "SaveConfig" method call of network interface.
+ */
+DBusMessage * wpas_dbus_handler_save_config(DBusMessage *message,
+					    struct wpa_supplicant *wpa_s)
+{
+	int ret;
+
+	if (!wpa_s->conf->update_config) {
+		return wpas_dbus_error_unknown_error(
+			message,
+			"Not allowed to update configuration (update_config=0)");
+	}
+
+	ret = wpa_config_write(wpa_s->confname, wpa_s->conf);
+	if (ret)
+		return wpas_dbus_error_unknown_error(
+			message, "Failed to update configuration");
+	return NULL;
+}
+#endif /* CONFIG_NO_CONFIG_WRITE */
+
+
 /**
  * wpas_dbus_handler_set_pkcs11_engine_and_module_path - Set PKCS #11 engine and module path
  * @message: Pointer to incoming dbus message
diff --git a/wpa_supplicant/dbus/dbus_new_handlers.h b/wpa_supplicant/dbus/dbus_new_handlers.h
index 1e9b173..86c8359 100644
--- a/wpa_supplicant/dbus/dbus_new_handlers.h
+++ b/wpa_supplicant/dbus/dbus_new_handlers.h
@@ -194,6 +194,9 @@
 DBusMessage * wpas_dbus_handler_tdls_teardown(DBusMessage *message,
 					      struct wpa_supplicant *wpa_s);
 
+DBusMessage * wpas_dbus_handler_save_config(DBusMessage *message,
+					    struct wpa_supplicant *wpa_s);
+
 DBusMessage * wpas_dbus_error_invalid_args(DBusMessage *message,
 					   const char *arg);
 DBusMessage * wpas_dbus_error_unknown_error(DBusMessage *message,
diff --git a/wpa_supplicant/events.c b/wpa_supplicant/events.c
index 8422170..cf2550c 100644
--- a/wpa_supplicant/events.c
+++ b/wpa_supplicant/events.c
@@ -303,6 +303,7 @@
 	wpa_s->key_mgmt = 0;
 
 	wpas_rrm_reset(wpa_s);
+	wpa_s->wnmsleep_used = 0;
 }
 
 
diff --git a/wpa_supplicant/wnm_sta.c b/wpa_supplicant/wnm_sta.c
index 9ab40c7..e1596cb 100644
--- a/wpa_supplicant/wnm_sta.c
+++ b/wpa_supplicant/wnm_sta.c
@@ -139,6 +139,8 @@
 	if (res < 0)
 		wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
 			   "(action=%d, intval=%d)", action, intval);
+	else
+		wpa_s->wnmsleep_used = 1;
 
 	os_free(wnmsleep_ie);
 	os_free(wnmtfs_ie);
@@ -255,6 +257,12 @@
 	const u8 *tfsresp_ie_end = NULL;
 	size_t left;
 
+	if (!wpa_s->wnmsleep_used) {
+		wpa_printf(MSG_DEBUG,
+			   "WNM: Ignore WNM-Sleep Mode Response frame since WNM-Sleep Mode has not been used in this association");
+		return;
+	}
+
 	if (len < 3)
 		return;
 	key_len_total = WPA_GET_LE16(frm + 1);
diff --git a/wpa_supplicant/wpa_supplicant.conf b/wpa_supplicant/wpa_supplicant.conf
index 6fe67e4..bcb6247 100644
--- a/wpa_supplicant/wpa_supplicant.conf
+++ b/wpa_supplicant/wpa_supplicant.conf
@@ -118,6 +118,25 @@
 # networks are found, a new IBSS or AP mode network is created.
 ap_scan=1
 
+# Whether to force passive scan for network connection
+#
+# By default, scans will send out Probe Request frames on channels that allow
+# active scanning. This advertise the local station to the world. Normally this
+# is fine, but users may wish to do passive scanning where the radio should only
+# listen quietly for Beacon frames and not send any Probe Request frames. Actual
+# functionality may be driver dependent.
+#
+# This parameter can be used to force only passive scanning to be used
+# for network connection cases. It should be noted that this will slow
+# down scan operations and reduce likelihood of finding the AP. In
+# addition, some use cases will override this due to functional
+# requirements, e.g., for finding an AP that uses hidden SSID
+# (scan_ssid=1) or P2P device discovery.
+#
+# 0:  Do normal scans (allow active scans) (default)
+# 1:  Do passive scans.
+#passive_scan=0
+
 # MPM residency
 # By default, wpa_supplicant implements the mesh peering manager (MPM) for an
 # open mesh. However, if the driver can implement the MPM, you may set this to
diff --git a/wpa_supplicant/wpa_supplicant_i.h b/wpa_supplicant/wpa_supplicant_i.h
index fc5fc17..5caa63e 100644
--- a/wpa_supplicant/wpa_supplicant_i.h
+++ b/wpa_supplicant/wpa_supplicant_i.h
@@ -669,6 +669,7 @@
 	unsigned int reattach:1; /* reassociation to the same BSS requested */
 	unsigned int mac_addr_changed:1;
 	unsigned int added_vif:1;
+	unsigned int wnmsleep_used:1;
 
 	struct os_reltime last_mac_addr_change;
 	int last_mac_addr_style;