static int _opp_set_availability()

in core.c [2643:2698]
42 lines of code
6 McCabe index (conditional complexity)

static int _opp_set_availability(struct device *dev, unsigned long freq,
				 bool availability_req)
{
	struct opp_table *opp_table;
	struct dev_pm_opp *tmp_opp, *opp = ERR_PTR(-ENODEV);
	int r = 0;

	/* Find the opp_table */
	opp_table = _find_opp_table(dev);
	if (IS_ERR(opp_table)) {
		r = PTR_ERR(opp_table);
		dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r);
		return r;
	}

	mutex_lock(&opp_table->lock);

	/* Do we have the frequency? */
	list_for_each_entry(tmp_opp, &opp_table->opp_list, node) {
		if (tmp_opp->rate == freq) {
			opp = tmp_opp;
			break;
		}
	}

	if (IS_ERR(opp)) {
		r = PTR_ERR(opp);
		goto unlock;
	}

	/* Is update really needed? */
	if (opp->available == availability_req)
		goto unlock;

	opp->available = availability_req;

	dev_pm_opp_get(opp);
	mutex_unlock(&opp_table->lock);

	/* Notify the change of the OPP availability */
	if (availability_req)
		blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ENABLE,
					     opp);
	else
		blocking_notifier_call_chain(&opp_table->head,
					     OPP_EVENT_DISABLE, opp);

	dev_pm_opp_put(opp);
	goto put_table;

unlock:
	mutex_unlock(&opp_table->lock);
put_table:
	dev_pm_opp_put_opp_table(opp_table);
	return r;
}