static void pm121_cpu_fans_tick()

in windfarm_pm121.c [718:779]

• 49 lines of code
• 10 McCabe index (conditional complexity)

static void pm121_cpu_fans_tick(struct pm121_cpu_state *st)
{
	s32 new_setpoint, temp, power;
	struct wf_control *fan_cpu = NULL;
	int rc;

	if (--st->ticks != 0) {
		if (pm121_readjust)
			goto readjust;
		return;
	}
	st->ticks = PM121_CPU_INTERVAL;

	fan_cpu = controls[FAN_CPU];

	rc = sensor_cpu_temp->ops->get_value(sensor_cpu_temp, &temp);
	if (rc) {
		printk(KERN_WARNING "pm121: CPU temp sensor error %d\n",
		       rc);
		pm121_failure_state |= FAILURE_SENSOR;
		return;
	}

	rc = sensor_cpu_power->ops->get_value(sensor_cpu_power, &power);
	if (rc) {
		printk(KERN_WARNING "pm121: CPU power sensor error %d\n",
		       rc);
		pm121_failure_state |= FAILURE_SENSOR;
		return;
	}

	pr_debug("pm121: CPU Fans tick ! CPU temp: %d.%03d°C, power: %d.%03d\n",
		 FIX32TOPRINT(temp), FIX32TOPRINT(power));

	if (temp > st->pid.param.tmax)
		pm121_failure_state |= FAILURE_OVERTEMP;

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

	/* correction */
	new_setpoint = pm121_correct(new_setpoint,
				     FAN_CPU,
				     st->pid.param.min);

	/* connected correction */
	new_setpoint = pm121_connect(FAN_CPU, new_setpoint);

	if (st->setpoint == new_setpoint)
		return;
	st->setpoint = new_setpoint;
	pr_debug("pm121: CPU corrected setpoint: %d RPM\n", (int)new_setpoint);

 readjust:
	if (fan_cpu && pm121_failure_state == 0) {
		rc = fan_cpu->ops->set_value(fan_cpu, st->setpoint);
		if (rc) {
			printk(KERN_WARNING "pm121: %s fan error %d\n",
			       fan_cpu->name, rc);
			pm121_failure_state |= FAILURE_FAN;
		}
	}
}