RDMA_READ_RESPONSE_ONLY
qp->s_ack_state = OP(RDMA_READ_RESPONSE_ONLY);
opcode == OP(RDMA_READ_RESPONSE_ONLY) &&
case OP(RDMA_READ_RESPONSE_ONLY):
case OP(RDMA_READ_RESPONSE_ONLY):
case OP(RC, RDMA_READ_RESPONSE_ONLY):