static int cci_pmu_init()

in arm-cci.c [1399:1441]

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

static int cci_pmu_init(struct cci_pmu *cci_pmu, struct platform_device *pdev)
{
	const struct cci_pmu_model *model = cci_pmu->model;
	char *name = model->name;
	u32 num_cntrs;

	if (WARN_ON(model->num_hw_cntrs > NUM_HW_CNTRS_MAX))
		return -EINVAL;
	if (WARN_ON(model->fixed_hw_cntrs > FIXED_HW_CNTRS_MAX))
		return -EINVAL;

	pmu_event_attr_group.attrs = model->event_attrs;
	pmu_format_attr_group.attrs = model->format_attrs;

	cci_pmu->pmu = (struct pmu) {
		.module		= THIS_MODULE,
		.name		= cci_pmu->model->name,
		.task_ctx_nr	= perf_invalid_context,
		.pmu_enable	= cci_pmu_enable,
		.pmu_disable	= cci_pmu_disable,
		.event_init	= cci_pmu_event_init,
		.add		= cci_pmu_add,
		.del		= cci_pmu_del,
		.start		= cci_pmu_start,
		.stop		= cci_pmu_stop,
		.read		= pmu_read,
		.attr_groups	= pmu_attr_groups,
		.capabilities	= PERF_PMU_CAP_NO_EXCLUDE,
	};

	cci_pmu->plat_device = pdev;
	num_cntrs = pmu_get_max_counters(cci_pmu);
	if (num_cntrs > cci_pmu->model->num_hw_cntrs) {
		dev_warn(&pdev->dev,
			"PMU implements more counters(%d) than supported by"
			" the model(%d), truncated.",
			num_cntrs, cci_pmu->model->num_hw_cntrs);
		num_cntrs = cci_pmu->model->num_hw_cntrs;
	}
	cci_pmu->num_cntrs = num_cntrs + cci_pmu->model->fixed_hw_cntrs;

	return perf_pmu_register(&cci_pmu->pmu, name, -1);
}