int devfreq_remove_governor()

in devfreq.c [1334:1382]

• 42 lines of code
• 6 McCabe index (conditional complexity)

int devfreq_remove_governor(struct devfreq_governor *governor)
{
	struct devfreq_governor *g;
	struct devfreq *devfreq;
	int err = 0;

	if (!governor) {
		pr_err("%s: Invalid parameters.\n", __func__);
		return -EINVAL;
	}

	mutex_lock(&devfreq_list_lock);
	g = find_devfreq_governor(governor->name);
	if (IS_ERR(g)) {
		pr_err("%s: governor %s not registered\n", __func__,
		       governor->name);
		err = PTR_ERR(g);
		goto err_out;
	}
	list_for_each_entry(devfreq, &devfreq_list, node) {
		int ret;
		struct device *dev = devfreq->dev.parent;

		if (!strncmp(devfreq->governor->name, governor->name,
			     DEVFREQ_NAME_LEN)) {
			/* we should have a devfreq governor! */
			if (!devfreq->governor) {
				dev_warn(dev, "%s: Governor %s NOT present\n",
					 __func__, governor->name);
				continue;
				/* Fall through */
			}
			ret = devfreq->governor->event_handler(devfreq,
						DEVFREQ_GOV_STOP, NULL);
			if (ret) {
				dev_warn(dev, "%s: Governor %s stop=%d\n",
					 __func__, devfreq->governor->name,
					 ret);
			}
			devfreq->governor = NULL;
		}
	}

	list_del(&governor->node);
err_out:
	mutex_unlock(&devfreq_list_lock);

	return err;
}