int of_get_required_opp_performance_state()

in of.c [1346:1376]

• 25 lines of code
• 4 McCabe index (conditional complexity)

int of_get_required_opp_performance_state(struct device_node *np, int index)
{
	struct dev_pm_opp *opp;
	struct device_node *required_np;
	struct opp_table *opp_table;
	int pstate = -EINVAL;

	required_np = of_parse_required_opp(np, index);
	if (!required_np)
		return -ENODEV;

	opp_table = _find_table_of_opp_np(required_np);
	if (IS_ERR(opp_table)) {
		pr_err("%s: Failed to find required OPP table %pOF: %ld\n",
		       __func__, np, PTR_ERR(opp_table));
		goto put_required_np;
	}

	opp = _find_opp_of_np(opp_table, required_np);
	if (opp) {
		pstate = opp->pstate;
		dev_pm_opp_put(opp);
	}

	dev_pm_opp_put_opp_table(opp_table);

put_required_np:
	of_node_put(required_np);

	return pstate;
}