mr_check_range
int mr_check_range(struct rxe_mr *mr, u64 iova, size_t length);
err = mr_check_range(mr, iova, length);
err = mr_check_range(mr, iova, length);
err = mr_check_range(mr, iova, sizeof(value));
err = mr_check_range(mr, iova, sizeof(value));
err = mr_check_range(mr, iova, sizeof(value));
err = mr_check_range(mr, iova, sizeof(value));
if (mr_check_range(mr, va + qp->resp.offset, resid)) {