static int _of_add_opp_table_v2()

in of.c [928:982]

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

static int _of_add_opp_table_v2(struct device *dev, struct opp_table *opp_table)
{
	struct device_node *np;
	int ret, count = 0;
	struct dev_pm_opp *opp;

	/* OPP table is already initialized for the device */
	mutex_lock(&opp_table->lock);
	if (opp_table->parsed_static_opps) {
		opp_table->parsed_static_opps++;
		mutex_unlock(&opp_table->lock);
		return 0;
	}

	opp_table->parsed_static_opps = 1;
	mutex_unlock(&opp_table->lock);

	/* We have opp-table node now, iterate over it and add OPPs */
	for_each_available_child_of_node(opp_table->np, np) {
		opp = _opp_add_static_v2(opp_table, dev, np);
		if (IS_ERR(opp)) {
			ret = PTR_ERR(opp);
			dev_err(dev, "%s: Failed to add OPP, %d\n", __func__,
				ret);
			of_node_put(np);
			goto remove_static_opp;
		} else if (opp) {
			count++;
		}
	}

	/* There should be one or more OPPs defined */
	if (!count) {
		dev_err(dev, "%s: no supported OPPs", __func__);
		ret = -ENOENT;
		goto remove_static_opp;
	}

	list_for_each_entry(opp, &opp_table->opp_list, node) {
		/* Any non-zero performance state would enable the feature */
		if (opp->pstate) {
			opp_table->genpd_performance_state = true;
			break;
		}
	}

	lazy_link_required_opp_table(opp_table);

	return 0;

remove_static_opp:
	_opp_remove_all_static(opp_table);

	return ret;
}