static int vdpa_nl_cmd_dev_del_set_doit()

in vdpa.c [650:682]

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

static int vdpa_nl_cmd_dev_del_set_doit(struct sk_buff *skb, struct genl_info *info)
{
	struct vdpa_mgmt_dev *mdev;
	struct vdpa_device *vdev;
	struct device *dev;
	const char *name;
	int err = 0;

	if (!info->attrs[VDPA_ATTR_DEV_NAME])
		return -EINVAL;
	name = nla_data(info->attrs[VDPA_ATTR_DEV_NAME]);

	mutex_lock(&vdpa_dev_mutex);
	dev = bus_find_device(&vdpa_bus, NULL, name, vdpa_name_match);
	if (!dev) {
		NL_SET_ERR_MSG_MOD(info->extack, "device not found");
		err = -ENODEV;
		goto dev_err;
	}
	vdev = container_of(dev, struct vdpa_device, dev);
	if (!vdev->mdev) {
		NL_SET_ERR_MSG_MOD(info->extack, "Only user created device can be deleted by user");
		err = -EINVAL;
		goto mdev_err;
	}
	mdev = vdev->mdev;
	mdev->ops->dev_del(mdev, vdev);
mdev_err:
	put_device(dev);
dev_err:
	mutex_unlock(&vdpa_dev_mutex);
	return err;
}