[Bug] mc_pos_control module _parameter_update_sub.updated() always return false

[hanhui03]

Describe the bug

mc_pos_control module _parameter_update_sub.updated() always return false, so this module cannot sense the parameter changes. Restart this module will back to normal.

mc_pos_control stop
mc_pos_control start

To Reproduce

No response

Expected behavior

No response

Screenshot / Media

No response

Flight Log

No response

Software Version

No response

Flight controller

All

Vehicle type

Multicopter

How are the different components wired up (including port information)

In HIL mode

Additional context

No response

[hanhui03]

Try adding px4_usleep(500_ms); at the beginning of the MulticopterPositionControl::MulticopterPositionControl() constructor. _parameter_update_sub.updated() can return true normally when the parameters change.

MulticopterPositionControl::MulticopterPositionControl(bool vtol) :
	ModuleParams(nullptr),
	ScheduledWorkItem(MODULE_NAME, px4::wq_configurations::nav_and_controllers),
	_vehicle_attitude_setpoint_pub(vtol ? ORB_ID(mc_virtual_attitude_setpoint) : ORB_ID(vehicle_attitude_setpoint))
{
	px4_usleep(500_ms); // relax...

	_sample_interval_s.update(0.01f); // 100 Hz default
	parameters_update(true);
	_tilt_limit_slew_rate.setSlewRate(.2f);
	_takeoff_status_pub.advertise();
}

Suspect uORB subscription has multi-threaded safety problem.