static int maybe_new_ambient_fan_speed()

in char/bbc_envctrl.c [320:352]

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

static int maybe_new_ambient_fan_speed(struct bbc_fan_control *fp)
{
	enum fan_action decision = prioritize_fan_action(FAN_AMBIENT);
	int ret;

	if (decision == FAN_SAME)
		return 0;

	ret = 1;
	if (decision == FAN_FULLBLAST) {
		if (fp->system_fan_speed >= FAN_SPEED_MAX)
			ret = 0;
		else
			fp->system_fan_speed = FAN_SPEED_MAX;
	} else {
		if (decision == FAN_FASTER) {
			if (fp->system_fan_speed >= FAN_SPEED_MAX)
				ret = 0;
			else
				fp->system_fan_speed += 2;
		} else {
			int orig_speed = fp->system_fan_speed;

			if (orig_speed <= FAN_SPEED_MIN ||
			    orig_speed <= (fp->cpu_fan_speed - 3))
				ret = 0;
			else
				fp->system_fan_speed -= 1;
		}
	}

	return ret;
}