static int genpd_summary_one()

in power/domain.c [3026:3084]

• 47 lines of code
• 8 McCabe index (conditional complexity)

static int genpd_summary_one(struct seq_file *s,
			struct generic_pm_domain *genpd)
{
	static const char * const status_lookup[] = {
		[GENPD_STATE_ON] = "on",
		[GENPD_STATE_OFF] = "off"
	};
	struct pm_domain_data *pm_data;
	const char *kobj_path;
	struct gpd_link *link;
	char state[16];
	int ret;

	ret = genpd_lock_interruptible(genpd);
	if (ret)
		return -ERESTARTSYS;

	if (WARN_ON(genpd->status >= ARRAY_SIZE(status_lookup)))
		goto exit;
	if (!genpd_status_on(genpd))
		snprintf(state, sizeof(state), "%s-%u",
			 status_lookup[genpd->status], genpd->state_idx);
	else
		snprintf(state, sizeof(state), "%s",
			 status_lookup[genpd->status]);
	seq_printf(s, "%-30s  %-50s %u", genpd->name, state, genpd->performance_state);

	/*
	 * Modifications on the list require holding locks on both
	 * parent and child, so we are safe.
	 * Also genpd->name is immutable.
	 */
	list_for_each_entry(link, &genpd->parent_links, parent_node) {
		if (list_is_first(&link->parent_node, &genpd->parent_links))
			seq_printf(s, "\n%48s", " ");
		seq_printf(s, "%s", link->child->name);
		if (!list_is_last(&link->parent_node, &genpd->parent_links))
			seq_puts(s, ", ");
	}

	list_for_each_entry(pm_data, &genpd->dev_list, list_node) {
		kobj_path = kobject_get_path(&pm_data->dev->kobj,
				genpd_is_irq_safe(genpd) ?
				GFP_ATOMIC : GFP_KERNEL);
		if (kobj_path == NULL)
			continue;

		seq_printf(s, "\n    %-50s  ", kobj_path);
		rtpm_status_str(s, pm_data->dev);
		perf_status_str(s, pm_data->dev);
		kfree(kobj_path);
	}

	seq_puts(s, "\n");
exit:
	genpd_unlock(genpd);

	return 0;
}