mlx5_ib_create_qp_rss
struct mlx5_ib_create_qp_rss *ucmd = params->ucmd;
flags = ((struct mlx5_ib_create_qp_rss *)ucmd)->flags;
if (inlen < offsetofend(struct mlx5_ib_create_qp_rss, flags))
ucmd = sizeof(struct mlx5_ib_create_qp_rss);
last = sizeof(struct mlx5_ib_create_qp_rss);