static void srpt_add_one(struct ib_device *device)
{
	struct srpt_device *sdev;
	struct srpt_port *sport;
	struct ib_srq_init_attr srq_attr;
	int i;

	pr_debug("device = %p, device->dma_ops = %p\n", device,
		 device->dma_ops);

	sdev = kzalloc(sizeof *sdev, GFP_KERNEL);
	if (!sdev)
		goto err;

	sdev->device = device;
	INIT_LIST_HEAD(&sdev->rch_list);
	init_waitqueue_head(&sdev->ch_releaseQ);
	spin_lock_init(&sdev->spinlock);

	sdev->pd = ib_alloc_pd(device);
	if (IS_ERR(sdev->pd))
		goto free_dev;

	sdev->srq_size = min(srpt_srq_size, sdev->device->attrs.max_srq_wr);

	srq_attr.event_handler = srpt_srq_event;
	srq_attr.srq_context = (void *)sdev;
	srq_attr.attr.max_wr = sdev->srq_size;
	srq_attr.attr.max_sge = 1;
	srq_attr.attr.srq_limit = 0;
	srq_attr.srq_type = IB_SRQT_BASIC;

	sdev->srq = ib_create_srq(sdev->pd, &srq_attr);
	if (IS_ERR(sdev->srq))
		goto err_pd;

	pr_debug("%s: create SRQ #wr= %d max_allow=%d dev= %s\n",
		 __func__, sdev->srq_size, sdev->device->attrs.max_srq_wr,
		 device->name);

	if (!srpt_service_guid)
		srpt_service_guid = be64_to_cpu(device->node_guid);

	sdev->cm_id = ib_create_cm_id(device, srpt_cm_handler, sdev);
	if (IS_ERR(sdev->cm_id))
		goto err_srq;

	/* print out target login information */
	pr_debug("Target login info: id_ext=%016llx,ioc_guid=%016llx,"
		 "pkey=ffff,service_id=%016llx\n", srpt_service_guid,
		 srpt_service_guid, srpt_service_guid);

	/*
	 * We do not have a consistent service_id (ie. also id_ext of target_id)
	 * to identify this target. We currently use the guid of the first HCA
	 * in the system as service_id; therefore, the target_id will change
	 * if this HCA is gone bad and replaced by different HCA
	 */
	if (ib_cm_listen(sdev->cm_id, cpu_to_be64(srpt_service_guid), 0))
		goto err_cm;

	INIT_IB_EVENT_HANDLER(&sdev->event_handler, sdev->device,
			      srpt_event_handler);
	if (ib_register_event_handler(&sdev->event_handler))
		goto err_cm;

	sdev->ioctx_ring = (struct srpt_recv_ioctx **)
		srpt_alloc_ioctx_ring(sdev, sdev->srq_size,
				      sizeof(*sdev->ioctx_ring[0]),
				      srp_max_req_size, DMA_FROM_DEVICE);
	if (!sdev->ioctx_ring)
		goto err_event;

	for (i = 0; i < sdev->srq_size; ++i)
		srpt_post_recv(sdev, sdev->ioctx_ring[i]);

	WARN_ON(sdev->device->phys_port_cnt > ARRAY_SIZE(sdev->port));

	for (i = 1; i <= sdev->device->phys_port_cnt; i++) {
		sport = &sdev->port[i - 1];
		sport->sdev = sdev;
		sport->port = i;
		sport->port_attrib.srp_max_rdma_size = DEFAULT_MAX_RDMA_SIZE;
		sport->port_attrib.srp_max_rsp_size = DEFAULT_MAX_RSP_SIZE;
		sport->port_attrib.srp_sq_size = DEF_SRPT_SQ_SIZE;
		INIT_WORK(&sport->work, srpt_refresh_port_work);

		if (srpt_refresh_port(sport)) {
			pr_err("MAD registration failed for %s-%d.\n",
			       srpt_sdev_name(sdev), i);
			goto err_ring;
		}
		snprintf(sport->port_guid, sizeof(sport->port_guid),
			"0x%016llx%016llx",
			be64_to_cpu(sport->gid.global.subnet_prefix),
			be64_to_cpu(sport->gid.global.interface_id));
	}

	spin_lock(&srpt_dev_lock);
	list_add_tail(&sdev->list, &srpt_dev_list);
	spin_unlock(&srpt_dev_lock);

out:
	ib_set_client_data(device, &srpt_client, sdev);
	pr_debug("added %s.\n", device->name);
	return;

err_ring:
	srpt_free_ioctx_ring((struct srpt_ioctx **)sdev->ioctx_ring, sdev,
			     sdev->srq_size, srp_max_req_size,
			     DMA_FROM_DEVICE);
err_event:
	ib_unregister_event_handler(&sdev->event_handler);
err_cm:
	ib_destroy_cm_id(sdev->cm_id);
err_srq:
	ib_destroy_srq(sdev->srq);
err_pd:
	ib_dealloc_pd(sdev->pd);
free_dev:
	kfree(sdev);
err:
	sdev = NULL;
	pr_info("%s(%s) failed.\n", __func__, device->name);
	goto out;
}
static void srpt_add_one(struct ib_device *device)
{
	struct srpt_device *sdev;
	struct srpt_port *sport;
	struct ib_srq_init_attr srq_attr;
	int i;

	pr_debug("device = %p, device->dma_ops = %p\n", device,
		 device->dma_ops);

	sdev = kzalloc(sizeof *sdev, GFP_KERNEL);
	if (!sdev)
		goto err;

	sdev->device = device;
	INIT_LIST_HEAD(&sdev->rch_list);
	init_waitqueue_head(&sdev->ch_releaseQ);
	spin_lock_init(&sdev->spinlock);

	sdev->pd = ib_alloc_pd(device);
	if (IS_ERR(sdev->pd))
		goto free_dev;

	sdev->srq_size = min(srpt_srq_size, sdev->device->attrs.max_srq_wr);

	srq_attr.event_handler = srpt_srq_event;
	srq_attr.srq_context = (void *)sdev;
	srq_attr.attr.max_wr = sdev->srq_size;
	srq_attr.attr.max_sge = 1;
	srq_attr.attr.srq_limit = 0;
	srq_attr.srq_type = IB_SRQT_BASIC;

	sdev->srq = ib_create_srq(sdev->pd, &srq_attr);
	if (IS_ERR(sdev->srq))
		goto err_pd;

	pr_debug("%s: create SRQ #wr= %d max_allow=%d dev= %s\n",
		 __func__, sdev->srq_size, sdev->device->attrs.max_srq_wr,
		 device->name);

	if (!srpt_service_guid)
		srpt_service_guid = be64_to_cpu(device->node_guid);

	sdev->cm_id = ib_create_cm_id(device, srpt_cm_handler, sdev);
	if (IS_ERR(sdev->cm_id))
		goto err_srq;

	 
	pr_debug("Target login info: id_ext=%016llx,ioc_guid=%016llx,"
		 "pkey=ffff,service_id=%016llx\n", srpt_service_guid,
		 srpt_service_guid, srpt_service_guid);

	 
	if (ib_cm_listen(sdev->cm_id, cpu_to_be64(srpt_service_guid), 0))
		goto err_cm;

	INIT_IB_EVENT_HANDLER(&sdev->event_handler, sdev->device,
			      srpt_event_handler);
	if (ib_register_event_handler(&sdev->event_handler))
		goto err_cm;

	sdev->ioctx_ring = (struct srpt_recv_ioctx **)
		srpt_alloc_ioctx_ring(sdev, sdev->srq_size,
				      sizeof(*sdev->ioctx_ring[0]),
				      srp_max_req_size, DMA_FROM_DEVICE);
	if (!sdev->ioctx_ring)
		goto err_event;

	for (i = 0; i < sdev->srq_size; ++i)
		srpt_post_recv(sdev, sdev->ioctx_ring[i]);

	WARN_ON(sdev->device->phys_port_cnt > ARRAY_SIZE(sdev->port));

	for (i = 1; i <= sdev->device->phys_port_cnt; i++) {
		sport = &sdev->port[i - 1];
		sport->sdev = sdev;
		sport->port = i;
		sport->port_attrib.srp_max_rdma_size = DEFAULT_MAX_RDMA_SIZE;
		sport->port_attrib.srp_max_rsp_size = DEFAULT_MAX_RSP_SIZE;
		sport->port_attrib.srp_sq_size = DEF_SRPT_SQ_SIZE;
		INIT_WORK(&sport->work, srpt_refresh_port_work);

		if (srpt_refresh_port(sport)) {
			pr_err("MAD registration failed for %s-%d.\n",
			       srpt_sdev_name(sdev), i);
			goto err_ring;
		}
		snprintf(sport->port_guid, sizeof(sport->port_guid),
			"0x%016llx%016llx",
			be64_to_cpu(sport->gid.global.subnet_prefix),
			be64_to_cpu(sport->gid.global.interface_id));
	}

	spin_lock(&srpt_dev_lock);
	list_add_tail(&sdev->list, &srpt_dev_list);
	spin_unlock(&srpt_dev_lock);

out:
	ib_set_client_data(device, &srpt_client, sdev);
	pr_debug("added %s.\n", device->name);
	return;

err_ring:
	srpt_free_ioctx_ring((struct srpt_ioctx **)sdev->ioctx_ring, sdev,
			     sdev->srq_size, srp_max_req_size,
			     DMA_FROM_DEVICE);
err_event:
	ib_unregister_event_handler(&sdev->event_handler);
err_cm:
	ib_destroy_cm_id(sdev->cm_id);
err_srq:
	ib_destroy_srq(sdev->srq);
err_pd:
	ib_dealloc_pd(sdev->pd);
free_dev:
	kfree(sdev);
err:
	sdev = NULL;
	pr_info("%s(%s) failed.\n", __func__, device->name);
	goto out;
}