rdma_fill_sgid_attr
ret = rdma_fill_sgid_attr(ah->device, ah_attr, &old_sgid_attr);
ret = rdma_fill_sgid_attr(qp->device, &attr->ah_attr,
ret = rdma_fill_sgid_attr(qp->device, &attr->alt_ah_attr,
ret = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr);
err = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr);