static int _opp_is_duplicate()

in core.c [1641:1678]

• 23 lines of code
• 5 McCabe index (conditional complexity)

static int _opp_is_duplicate(struct device *dev, struct dev_pm_opp *new_opp,
			     struct opp_table *opp_table,
			     struct list_head **head)
{
	struct dev_pm_opp *opp;
	int opp_cmp;

	/*
	 * Insert new OPP in order of increasing frequency and discard if
	 * already present.
	 *
	 * Need to use &opp_table->opp_list in the condition part of the 'for'
	 * loop, don't replace it with head otherwise it will become an infinite
	 * loop.
	 */
	list_for_each_entry(opp, &opp_table->opp_list, node) {
		opp_cmp = _opp_compare_key(new_opp, opp);
		if (opp_cmp > 0) {
			*head = &opp->node;
			continue;
		}

		if (opp_cmp < 0)
			return 0;

		/* Duplicate OPPs */
		dev_warn(dev, "%s: duplicate OPPs detected. Existing: freq: %lu, volt: %lu, enabled: %d. New: freq: %lu, volt: %lu, enabled: %d\n",
			 __func__, opp->rate, opp->supplies[0].u_volt,
			 opp->available, new_opp->rate,
			 new_opp->supplies[0].u_volt, new_opp->available);

		/* Should we compare voltages for all regulators here ? */
		return opp->available &&
		       new_opp->supplies[0].u_volt == opp->supplies[0].u_volt ? -EBUSY : -EEXIST;
	}

	return 0;
}