static int int3496_probe()

in extcon-intel-int3496.c [88:159]

• 57 lines of code
• 11 McCabe index (conditional complexity)

static int int3496_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct int3496_data *data;
	int ret;

	ret = devm_acpi_dev_add_driver_gpios(dev, acpi_int3496_default_gpios);
	if (ret) {
		dev_err(dev, "can't add GPIO ACPI mapping\n");
		return ret;
	}

	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->dev = dev;
	ret = devm_delayed_work_autocancel(dev, &data->work, int3496_do_usb_id);
	if (ret)
		return ret;

	data->gpio_usb_id = devm_gpiod_get(dev, "id", GPIOD_IN);
	if (IS_ERR(data->gpio_usb_id)) {
		ret = PTR_ERR(data->gpio_usb_id);
		dev_err(dev, "can't request USB ID GPIO: %d\n", ret);
		return ret;
	}

	data->usb_id_irq = gpiod_to_irq(data->gpio_usb_id);
	if (data->usb_id_irq < 0) {
		dev_err(dev, "can't get USB ID IRQ: %d\n", data->usb_id_irq);
		return data->usb_id_irq;
	}

	data->gpio_vbus_en = devm_gpiod_get(dev, "vbus", GPIOD_ASIS);
	if (IS_ERR(data->gpio_vbus_en))
		dev_info(dev, "can't request VBUS EN GPIO\n");

	data->gpio_usb_mux = devm_gpiod_get(dev, "mux", GPIOD_ASIS);
	if (IS_ERR(data->gpio_usb_mux))
		dev_info(dev, "can't request USB MUX GPIO\n");

	/* register extcon device */
	data->edev = devm_extcon_dev_allocate(dev, int3496_cable);
	if (IS_ERR(data->edev))
		return -ENOMEM;

	ret = devm_extcon_dev_register(dev, data->edev);
	if (ret < 0) {
		dev_err(dev, "can't register extcon device: %d\n", ret);
		return ret;
	}

	ret = devm_request_threaded_irq(dev, data->usb_id_irq,
					NULL, int3496_thread_isr,
					IRQF_SHARED | IRQF_ONESHOT |
					IRQF_TRIGGER_RISING |
					IRQF_TRIGGER_FALLING,
					dev_name(dev), data);
	if (ret < 0) {
		dev_err(dev, "can't request IRQ for USB ID GPIO: %d\n", ret);
		return ret;
	}

	/* process id-pin so that we start with the right status */
	queue_delayed_work(system_wq, &data->work, 0);
	flush_delayed_work(&data->work);

	platform_set_drvdata(pdev, data);

	return 0;
}