static unsigned long get_target_state()

in gov_step_wise.c [37:103]

• 57 lines of code
• 19 McCabe index (conditional complexity)

static unsigned long get_target_state(struct thermal_instance *instance,
				enum thermal_trend trend, bool throttle)
{
	struct thermal_cooling_device *cdev = instance->cdev;
	unsigned long cur_state;
	unsigned long next_target;

	/*
	 * We keep this instance the way it is by default.
	 * Otherwise, we use the current state of the
	 * cdev in use to determine the next_target.
	 */
	cdev->ops->get_cur_state(cdev, &cur_state);
	next_target = instance->target;
	dev_dbg(&cdev->device, "cur_state=%ld\n", cur_state);

	if (!instance->initialized) {
		if (throttle) {
			next_target = (cur_state + 1) >= instance->upper ?
					instance->upper :
					((cur_state + 1) < instance->lower ?
					instance->lower : (cur_state + 1));
		} else {
			next_target = THERMAL_NO_TARGET;
		}

		return next_target;
	}

	switch (trend) {
	case THERMAL_TREND_RAISING:
		if (throttle) {
			next_target = cur_state < instance->upper ?
				    (cur_state + 1) : instance->upper;
			if (next_target < instance->lower)
				next_target = instance->lower;
		}
		break;
	case THERMAL_TREND_RAISE_FULL:
		if (throttle)
			next_target = instance->upper;
		break;
	case THERMAL_TREND_DROPPING:
		if (cur_state <= instance->lower) {
			if (!throttle)
				next_target = THERMAL_NO_TARGET;
		} else {
			if (!throttle) {
				next_target = cur_state - 1;
				if (next_target > instance->upper)
					next_target = instance->upper;
			}
		}
		break;
	case THERMAL_TREND_DROP_FULL:
		if (cur_state == instance->lower) {
			if (!throttle)
				next_target = THERMAL_NO_TARGET;
		} else
			next_target = instance->lower;
		break;
	default:
		break;
	}

	return next_target;
}