static void pm121_sys_fans_tick()

in windfarm_pm121.c [580:636]

• 48 lines of code
• 8 McCabe index (conditional complexity)

static void pm121_sys_fans_tick(int loop_id)
{
	struct pm121_sys_param *param;
	struct pm121_sys_state *st;
	struct wf_sensor *sensor;
	struct wf_control *control;
	s32 temp, new_setpoint;
	int rc;

	param = &(pm121_sys_all_params[loop_id][pm121_mach_model-2]);
	st = pm121_sys_state[loop_id];
	sensor = *(param->sensor);
	control = controls[param->control_id];

	if (--st->ticks != 0) {
		if (pm121_readjust)
			goto readjust;
		return;
	}
	st->ticks = PM121_SYS_INTERVAL;

	rc = sensor->ops->get_value(sensor, &temp);
	if (rc) {
		printk(KERN_WARNING "windfarm: %s sensor error %d\n",
		       sensor->name, rc);
		pm121_failure_state |= FAILURE_SENSOR;
		return;
	}

	pr_debug("pm121: %s Fan tick ! %s: %d.%03d\n",
		 loop_names[loop_id], sensor->name,
		 FIX32TOPRINT(temp));

	new_setpoint = wf_pid_run(&st->pid, temp);

	/* correction */
	new_setpoint = pm121_correct(new_setpoint,
				     param->control_id,
				     st->pid.param.min);
	/* linked corretion */
	new_setpoint = pm121_connect(param->control_id, new_setpoint);

	if (new_setpoint == st->setpoint)
		return;
	st->setpoint = new_setpoint;
	pr_debug("pm121: %s corrected setpoint: %d RPM\n",
		 control->name, (int)new_setpoint);
 readjust:
	if (control && pm121_failure_state == 0) {
		rc = control->ops->set_value(control, st->setpoint);
		if (rc) {
			printk(KERN_WARNING "windfarm: %s fan error %d\n",
			       control->name, rc);
			pm121_failure_state |= FAILURE_FAN;
		}
	}
}