param save: Add a blocking API for param saves to be used from shell.

src/modules/commander/airspeed_calibration.cpp

@@ -180,7 +180,7 @@ int do_airspeed_calibration(orb_advert_t *mavlink_log_pub)
 
 					/* save */
 					calibration_log_info(mavlink_log_pub, CAL_QGC_PROGRESS_MSG, 0);
-					param_save_default();
+					param_save_default(true);
 
 					feedback_calibration_failed(mavlink_log_pub);
 					return PX4_ERROR;

src/modules/commander/worker_thread.cpp

@@ -158,7 +158,7 @@ void WorkerThread::threadEntry()
 		break;
 
 	case Request::ParamSaveDefault:
-		_ret_value = param_save_default();
+		_ret_value = param_save_default(true);
 
 		if (_ret_value != 0) {
 			mavlink_log_critical(&_mavlink_log_pub, "Error saving settings\t");
@@ -175,7 +175,7 @@ void WorkerThread::threadEntry()
 	case Request::ParamResetSensorFactory: {
 			const char *reset_cal[] = { "CAL_ACC*", "CAL_GYRO*", "CAL_MAG*" };
 			param_reset_specific(reset_cal, sizeof(reset_cal) / sizeof(reset_cal[0]));
-			_ret_value = param_save_default();
+			_ret_value = param_save_default(true);
 #if defined(CONFIG_BOARDCTL_RESET)
 			px4_reboot_request(false, 400_ms);
 #endif // CONFIG_BOARDCTL_RESET

src/modules/temperature_compensation/temperature_calibration/task.cpp

@@ -284,7 +284,7 @@ void TemperatureCalibration::task_main()
 		}
 
 		param_notify_changes();
-		int ret = param_save_default();
+		int ret = param_save_default(true);
 
 		if (ret != 0) {
 			PX4_ERR("Failed to save params (%i)", ret);