int arm_pmu_device_probe()

in arm_pmu_platform.c [187:245]

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

int arm_pmu_device_probe(struct platform_device *pdev,
			 const struct of_device_id *of_table,
			 const struct pmu_probe_info *probe_table)
{
	armpmu_init_fn init_fn;
	struct device *dev = &pdev->dev;
	struct arm_pmu *pmu;
	int ret = -ENODEV;

	pmu = armpmu_alloc();
	if (!pmu)
		return -ENOMEM;

	pmu->plat_device = pdev;

	ret = pmu_parse_irqs(pmu);
	if (ret)
		goto out_free;

	init_fn = of_device_get_match_data(dev);
	if (init_fn) {
		pmu->secure_access = of_property_read_bool(dev->of_node,
							   "secure-reg-access");

		/* arm64 systems boot only as non-secure */
		if (IS_ENABLED(CONFIG_ARM64) && pmu->secure_access) {
			dev_warn(dev, "ignoring \"secure-reg-access\" property for arm64\n");
			pmu->secure_access = false;
		}

		ret = init_fn(pmu);
	} else if (probe_table) {
		cpumask_setall(&pmu->supported_cpus);
		ret = probe_current_pmu(pmu, probe_table);
	}

	if (ret) {
		dev_err(dev, "failed to probe PMU!\n");
		goto out_free;
	}

	ret = armpmu_request_irqs(pmu);
	if (ret)
		goto out_free_irqs;

	ret = armpmu_register(pmu);
	if (ret) {
		dev_err(dev, "failed to register PMU devices!\n");
		goto out_free_irqs;
	}

	return 0;

out_free_irqs:
	armpmu_free_irqs(pmu);
out_free:
	armpmu_free(pmu);
	return ret;
}