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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Lijun Ou <oulijun@huawei.com>,
        Doug Ledford <dledford@redhat.com>,
        Sasha Levin <alexander.levin@microsoft.com>
Subject: [PATCH 4.16 134/279] RDMA/hns: Intercept illegal RDMA operation when use inline data
Date:   Mon, 18 Jun 2018 10:11:59 +0200
Message-Id: <20180618080614.380410593@linuxfoundation.org>
In-Reply-To: <20180618080608.851973560@linuxfoundation.org>
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4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: oulijun <oulijun@huawei.com>

[ Upstream commit 328d405b3d4c8dd1f06bfd77f498e23281ae348c ]

RDMA read operation is not supported inline data. If user cofigures
issue a RDMA read and use inline data, it will happen a hardware
error.

Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/infiniband/hw/hns/hns_roce_hw_v2.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -71,6 +71,11 @@ static int set_rwqe_data_seg(struct ib_q
 			return -EINVAL;
 		}
 
+		if (wr->opcode == IB_WR_RDMA_READ) {
+			dev_err(hr_dev->dev, "Not support inline data!\n");
+			return -EINVAL;
+		}
+
 		for (i = 0; i < wr->num_sge; i++) {
 			memcpy(wqe, ((void *)wr->sg_list[i].addr),
 			       wr->sg_list[i].length);