static int psci_cpuidle_domain_probe()

in cpuidle-psci-domain.c [252:301]

• 34 lines of code
• 7 McCabe index (conditional complexity)

static int psci_cpuidle_domain_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct device_node *node;
	bool use_osi;
	int ret = 0, pd_count = 0;

	if (!np)
		return -ENODEV;

	/* If OSI mode is supported, let's try to enable it. */
	use_osi = psci_pd_try_set_osi_mode();

	/*
	 * Parse child nodes for the "#power-domain-cells" property and
	 * initialize a genpd/genpd-of-provider pair when it's found.
	 */
	for_each_child_of_node(np, node) {
		if (!of_find_property(node, "#power-domain-cells", NULL))
			continue;

		ret = psci_pd_init(node, use_osi);
		if (ret)
			goto put_node;

		pd_count++;
	}

	/* Bail out if not using the hierarchical CPU topology. */
	if (!pd_count)
		goto no_pd;

	/* Link genpd masters/subdomains to model the CPU topology. */
	ret = psci_pd_init_topology(np);
	if (ret)
		goto remove_pd;

	pr_info("Initialized CPU PM domain topology\n");
	return 0;

put_node:
	of_node_put(node);
remove_pd:
	psci_pd_remove();
	pr_err("failed to create CPU PM domains ret=%d\n", ret);
no_pd:
	if (use_osi)
		psci_set_osi_mode(false);
	return ret;
}