static ssize_t available_governors_show()

in devfreq.c [1484:1527]

• 27 lines of code
• 5 McCabe index (conditional complexity)

static ssize_t available_governors_show(struct device *d,
					struct device_attribute *attr,
					char *buf)
{
	struct devfreq *df = to_devfreq(d);
	ssize_t count = 0;

	if (!df->governor)
		return -EINVAL;

	mutex_lock(&devfreq_list_lock);

	/*
	 * The devfreq with immutable governor (e.g., passive) shows
	 * only own governor.
	 */
	if (IS_SUPPORTED_FLAG(df->governor->flags, IMMUTABLE)) {
		count = scnprintf(&buf[count], DEVFREQ_NAME_LEN,
				  "%s ", df->governor->name);
	/*
	 * The devfreq device shows the registered governor except for
	 * immutable governors such as passive governor .
	 */
	} else {
		struct devfreq_governor *governor;

		list_for_each_entry(governor, &devfreq_governor_list, node) {
			if (IS_SUPPORTED_FLAG(governor->flags, IMMUTABLE))
				continue;
			count += scnprintf(&buf[count], (PAGE_SIZE - count - 2),
					   "%s ", governor->name);
		}
	}

	mutex_unlock(&devfreq_list_lock);

	/* Truncate the trailing space */
	if (count)
		count--;

	count += sprintf(&buf[count], "\n");

	return count;
}