static void wf_smu_create_sys_fans()

in windfarm_pm81.c [264:326]

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

static void wf_smu_create_sys_fans(void)
{
	struct wf_smu_sys_fans_param *param = NULL;
	struct wf_pid_param pid_param;
	int i;

	/* First, locate the params for this model */
	for (i = 0; i < WF_SMU_SYS_FANS_NUM_CONFIGS; i++)
		if (wf_smu_sys_all_params[i].model_id == wf_smu_mach_model) {
			param = &wf_smu_sys_all_params[i];
			break;
		}

	/* No params found, put fans to max */
	if (param == NULL) {
		printk(KERN_WARNING "windfarm: System fan config not found "
		       "for this machine model, max fan speed\n");
		goto fail;
	}

	/* Alloc & initialize state */
	wf_smu_sys_fans = kmalloc(sizeof(struct wf_smu_sys_fans_state),
				  GFP_KERNEL);
	if (wf_smu_sys_fans == NULL) {
		printk(KERN_WARNING "windfarm: Memory allocation error"
		       " max fan speed\n");
		goto fail;
	}
	wf_smu_sys_fans->ticks = 1;
	wf_smu_sys_fans->scale0 = param->scale0;
	wf_smu_sys_fans->offset0 = param->offset0;
	wf_smu_sys_fans->scale1 = param->scale1;
	wf_smu_sys_fans->offset1 = param->offset1;

	/* Fill PID params */
	pid_param.gd = param->gd;
	pid_param.gp = param->gp;
	pid_param.gr = param->gr;
	pid_param.interval = WF_SMU_SYS_FANS_INTERVAL;
	pid_param.history_len = WF_SMU_SYS_FANS_HISTORY_SIZE;
	pid_param.itarget = param->itarget;
	pid_param.min = wf_control_get_min(fan_system);
	pid_param.max = wf_control_get_max(fan_system);
	if (fan_hd) {
		pid_param.min =
			max(pid_param.min, wf_control_get_min(fan_hd));
		pid_param.max =
			min(pid_param.max, wf_control_get_max(fan_hd));
	}
	wf_pid_init(&wf_smu_sys_fans->pid, &pid_param);

	DBG("wf: System Fan control initialized.\n");
	DBG("    itarged=%d.%03d, min=%d RPM, max=%d RPM\n",
	    FIX32TOPRINT(pid_param.itarget), pid_param.min, pid_param.max);
	return;

 fail:

	if (fan_system)
		wf_control_set_max(fan_system);
	if (fan_hd)
		wf_control_set_max(fan_hd);
}