TCMU_ATTR_DEVICE_ID
ret = nla_put_u32(skb, TCMU_ATTR_DEVICE_ID, udev->se_dev.dev_index);
[TCMU_ATTR_DEVICE_ID] = { .type = NLA_U32 },
!info->attrs[TCMU_ATTR_DEVICE_ID]) {
dev_id = nla_get_u32(info->attrs[TCMU_ATTR_DEVICE_ID]);