RDMA/hns: Fix init resp when alloc ucontext

The data in resp will be copied from kernel to userspace, thus it needs to
be initialized to zeros to avoid copying uninited stack memory.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: e088a685eae9 ("RDMA/hns: Support rq record doorbell for the user space")
Signed-off-by: Yixian Liu <liuyixian@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
static int hns_roce_setup_hca(struct hns_roce_dev *hr_dev)
{
	int ret;
	struct device *dev = hr_dev->dev;

	spin_lock_init(&hr_dev->sm_lock);
	spin_lock_init(&hr_dev->bt_cmd_lock);

	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) {
		INIT_LIST_HEAD(&hr_dev->pgdir_list);
		mutex_init(&hr_dev->pgdir_mutex);
	}

	ret = hns_roce_init_uar_table(hr_dev);
	if (ret) {
		dev_err(dev, "Failed to initialize uar table. aborting\n");
		return ret;
	}

	ret = hns_roce_uar_alloc(hr_dev, &hr_dev->priv_uar);
	if (ret) {
		dev_err(dev, "Failed to allocate priv_uar.\n");
		goto err_uar_table_free;
	}

	ret = hns_roce_init_pd_table(hr_dev);
	if (ret) {
		dev_err(dev, "Failed to init protected domain table.\n");
		goto err_uar_alloc_free;
	}

	ret = hns_roce_init_mr_table(hr_dev);
	if (ret) {
		dev_err(dev, "Failed to init memory region table.\n");
		goto err_pd_table_free;
	}

	ret = hns_roce_init_cq_table(hr_dev);
	if (ret) {
		dev_err(dev, "Failed to init completion queue table.\n");
		goto err_mr_table_free;
	}

	ret = hns_roce_init_qp_table(hr_dev);
	if (ret) {
		dev_err(dev, "Failed to init queue pair table.\n");
		goto err_cq_table_free;
	}

	return 0;

err_cq_table_free:
	hns_roce_cleanup_cq_table(hr_dev);

err_mr_table_free:
	hns_roce_cleanup_mr_table(hr_dev);

err_pd_table_free:
	hns_roce_cleanup_pd_table(hr_dev);

err_uar_alloc_free:
	hns_roce_uar_free(hr_dev, &hr_dev->priv_uar);

err_uar_table_free:
	hns_roce_cleanup_uar_table(hr_dev);
	return ret;
}

static int hns_roce_setup_hca(struct hns_roce_dev *hr_dev)
{
	int ret;
	struct device *dev = hr_dev->dev;

	spin_lock_init(&hr_dev->sm_lock);
	spin_lock_init(&hr_dev->bt_cmd_lock);

	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) {
		INIT_LIST_HEAD(&hr_dev->pgdir_list);
		mutex_init(&hr_dev->pgdir_mutex);
	}

	ret = hns_roce_init_uar_table(hr_dev);
	if (ret) {
		dev_err(dev, "Failed to initialize uar table. aborting\n");
		return ret;
	}

	ret = hns_roce_uar_alloc(hr_dev, &hr_dev->priv_uar);
	if (ret) {
		dev_err(dev, "Failed to allocate priv_uar.\n");
		goto err_uar_table_free;
	}

	ret = hns_roce_init_pd_table(hr_dev);
	if (ret) {
		dev_err(dev, "Failed to init protected domain table.\n");
		goto err_uar_alloc_free;
	}

	ret = hns_roce_init_mr_table(hr_dev);
	if (ret) {
		dev_err(dev, "Failed to init memory region table.\n");
		goto err_pd_table_free;
	}

	ret = hns_roce_init_cq_table(hr_dev);
	if (ret) {
		dev_err(dev, "Failed to init completion queue table.\n");
		goto err_mr_table_free;
	}

	ret = hns_roce_init_qp_table(hr_dev);
	if (ret) {
		dev_err(dev, "Failed to init queue pair table.\n");
		goto err_cq_table_free;
	}

	return 0;

err_cq_table_free:
	hns_roce_cleanup_cq_table(hr_dev);

err_mr_table_free:
	hns_roce_cleanup_mr_table(hr_dev);

err_pd_table_free:
	hns_roce_cleanup_pd_table(hr_dev);

err_uar_alloc_free:
	hns_roce_uar_free(hr_dev, &hr_dev->priv_uar);

err_uar_table_free:
	hns_roce_cleanup_uar_table(hr_dev);
	return ret;
}
