int vmbus_device_register()

in vmbus_drv.c [2086:2133]

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

int vmbus_device_register(struct hv_device *child_device_obj)
{
	struct kobject *kobj = &child_device_obj->device.kobj;
	int ret;

	dev_set_name(&child_device_obj->device, "%pUl",
		     &child_device_obj->channel->offermsg.offer.if_instance);

	child_device_obj->device.bus = &hv_bus;
	child_device_obj->device.parent = &hv_acpi_dev->dev;
	child_device_obj->device.release = vmbus_device_release;

	/*
	 * Register with the LDM. This will kick off the driver/device
	 * binding...which will eventually call vmbus_match() and vmbus_probe()
	 */
	ret = device_register(&child_device_obj->device);
	if (ret) {
		pr_err("Unable to register child device\n");
		return ret;
	}

	child_device_obj->channels_kset = kset_create_and_add("channels",
							      NULL, kobj);
	if (!child_device_obj->channels_kset) {
		ret = -ENOMEM;
		goto err_dev_unregister;
	}

	ret = vmbus_add_channel_kobj(child_device_obj,
				     child_device_obj->channel);
	if (ret) {
		pr_err("Unable to register primary channeln");
		goto err_kset_unregister;
	}
	hv_debug_add_dev_dir(child_device_obj);

	child_device_obj->device.dma_mask = &vmbus_dma_mask;
	child_device_obj->device.dma_parms = &child_device_obj->dma_parms;
	return 0;

err_kset_unregister:
	kset_unregister(child_device_obj->channels_kset);

err_dev_unregister:
	device_unregister(&child_device_obj->device);
	return ret;
}