static int __init pnpacpi_add_device()

in pnpacpi/core.c [209:284]

• 55 lines of code
• 18 McCabe index (conditional complexity)

static int __init pnpacpi_add_device(struct acpi_device *device)
{
	struct pnp_dev *dev;
	const char *pnpid;
	struct acpi_hardware_id *id;
	int error;

	/* Skip devices that are already bound */
	if (device->physical_node_count)
		return 0;

	/*
	 * If a PnPacpi device is not present , the device
	 * driver should not be loaded.
	 */
	if (!acpi_has_method(device->handle, "_CRS"))
		return 0;

	pnpid = pnpacpi_get_id(device);
	if (!pnpid)
		return 0;

	if (!device->status.present)
		return 0;

	dev = pnp_alloc_dev(&pnpacpi_protocol, num, pnpid);
	if (!dev)
		return -ENOMEM;

	ACPI_COMPANION_SET(&dev->dev, device);
	dev->data = device;
	/* .enabled means the device can decode the resources */
	dev->active = device->status.enabled;
	if (acpi_has_method(device->handle, "_SRS"))
		dev->capabilities |= PNP_CONFIGURABLE;
	dev->capabilities |= PNP_READ;
	if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
		dev->capabilities |= PNP_WRITE;
	if (device->flags.removable)
		dev->capabilities |= PNP_REMOVABLE;
	if (acpi_has_method(device->handle, "_DIS"))
		dev->capabilities |= PNP_DISABLE;

	if (strlen(acpi_device_name(device)))
		strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
	else
		strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));

	if (dev->active)
		pnpacpi_parse_allocated_resource(dev);

	if (dev->capabilities & PNP_CONFIGURABLE)
		pnpacpi_parse_resource_option_data(dev);

	list_for_each_entry(id, &device->pnp.ids, list) {
		if (!strcmp(id->id, pnpid))
			continue;
		if (!ispnpidacpi(id->id))
			continue;
		pnp_add_id(dev, id->id);
	}

	/* clear out the damaged flags */
	if (!dev->active)
		pnp_init_resources(dev);

	error = pnp_add_device(dev);
	if (error) {
		put_device(&dev->dev);
		return error;
	}

	num++;

	return 0;
}