OPP: Improve _find_table_of_opp_np() (699e21e4) · Commits · 戴 / test

Make _find_table_of_opp_np() more efficient by using of_get_parent() to find the parent OPP table node. Tested-by:

drivers/opp/of.c

+10 −4

Original line number	Diff line number	Diff line
		@@ -114,19 +114,25 @@ static struct device_node of_parse_required_opp(struct device_node np,
		static struct opp_table _find_table_of_opp_np(struct device_node opp_np)
		{
		struct opp_table *opp_table;
		struct dev_pm_opp *opp;
		struct device_node *opp_table_np;

		lockdep_assert_held(&opp_table_lock);

		opp_table_np = of_get_parent(opp_np);
		if (!opp_table_np)
		goto err;

		/* It is safe to put the node now as all we need now is its address */
		of_node_put(opp_table_np);

		list_for_each_entry(opp_table, &opp_tables, node) {
		opp = _find_opp_of_np(opp_table, opp_np);
		if (opp) {
		dev_pm_opp_put(opp);
		if (opp_table_np == opp_table->np) {
		_get_opp_table_kref(opp_table);
		return opp_table;
		}
		}

		err:
		return ERR_PTR(-ENODEV);
		}