[linux] Fix the device failed to reconnect wifi after power cycle (#2…

…3504)

* [linux] Fix the device failed to reconnect wifi after power cycle

* Add return to prevent indent in the following code

src/platform/Linux/ConnectivityManagerImpl.cpp

@@ -1060,7 +1060,24 @@ void ConnectivityManagerImpl::_ConnectWiFiNetworkAsyncCallback(GObject * source_
                 }
                 mpConnectCallback = nullptr;
             });
+
+            return;
+        }
+
+        GError * gerror = nullptr;
+
+        result = wpa_fi_w1_wpa_supplicant1_interface_call_save_config_sync(mWpaSupplicant.iface, nullptr, &gerror);
+        if (result)
+        {
+            ChipLogProgress(DeviceLayer, "wpa_supplicant: save config succeeded!");
         }
+        else
+        {
+            ChipLogProgress(DeviceLayer, "wpa_supplicant: failed to save config: %s", gerror ? gerror->message : "unknown error");
+        }
+
+        if (gerror != nullptr)
+            g_error_free(gerror);
     }
 }