static void cpu_fans_tick_combined()

in windfarm_pm72.c [307:389]

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

static void cpu_fans_tick_combined(void)
{
	s32 temp0, power0, temp1, power1, t_max = 0;
	s32 temp, power, intake, pump;
	struct wf_control *pump0, *pump1;
	struct wf_cpu_pid_state *sp = &cpu_pid[0];
	int err, cpu;

	DBG_LOTS("* cpu fans_tick_combined()\n");

	/* Read current speed from cpu 0 */
	wf_control_get(cpu_rear_fans[0], &sp->target);

	DBG_LOTS("  CPUs: cur_target = %d RPM\n", sp->target);

	/* Read values for both CPUs */
	err = read_one_cpu_vals(0, &temp0, &power0);
	if (err) {
		failure_state |= FAILURE_SENSOR;
		cpu_max_all_fans();
		return;
	}
	err = read_one_cpu_vals(1, &temp1, &power1);
	if (err) {
		failure_state |= FAILURE_SENSOR;
		cpu_max_all_fans();
		return;
	}

	/* Keep track of highest temp */
	t_max = max(t_max, max(temp0, temp1));

	/* Handle possible overtemps */
	if (cpu_check_overtemp(t_max))
		return;

	/* Use the max temp & power of both */
	temp = max(temp0, temp1);
	power = max(power0, power1);

	/* Run PID */
	wf_cpu_pid_run(sp, power, temp);

	/* Scale result for intake fan */
	intake = (sp->target * CPU_INTAKE_SCALE) >> 16;

	/* Same deal with pump speed */
	pump0 = cpu_pumps[0];
	pump1 = cpu_pumps[1];
	if (!pump0) {
		pump0 = pump1;
		pump1 = NULL;
	}
	pump = (sp->target * wf_control_get_max(pump0)) /
		cpu_mpu_data[0]->rmaxn_exhaust_fan;

	DBG_LOTS("  CPUs: target = %d RPM\n", sp->target);
	DBG_LOTS("  CPUs: intake = %d RPM\n", intake);
	DBG_LOTS("  CPUs: pump   = %d RPM\n", pump);

	for (cpu = 0; cpu < nr_chips; cpu++) {
		err = wf_control_set(cpu_rear_fans[cpu], sp->target);
		if (err) {
			pr_warn("wf_pm72: Fan %s reports error %d\n",
				cpu_rear_fans[cpu]->name, err);
			failure_state |= FAILURE_FAN;
		}
		err = wf_control_set(cpu_front_fans[cpu], intake);
		if (err) {
			pr_warn("wf_pm72: Fan %s reports error %d\n",
				cpu_front_fans[cpu]->name, err);
			failure_state |= FAILURE_FAN;
		}
		err = 0;
		if (cpu_pumps[cpu])
			err = wf_control_set(cpu_pumps[cpu], pump);
		if (err) {
			pr_warn("wf_pm72: Pump %s reports error %d\n",
				cpu_pumps[cpu]->name, err);
			failure_state |= FAILURE_FAN;
		}
	}
}