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RDMA/hns: Fixes missing error code of CMDQ

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[ Upstream commit 8f86e2eadac968200a6ab1d7074fc0f5cbc1e075 ]

When posting a multi-descriptors command, the error code of previous
failed descriptors may be rewrote to 0 by a later successful descriptor.

Fixes: a04ff739f2 ("RDMA/hns: Add command queue support for hip08 RoCE driver")
Link: https://lore.kernel.org/r/1612688143-28226-3-git-send-email-liweihang@huawei.com
Signed-off-by: Lang Cheng <chenglang@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Lang Cheng 2021-02-07 16:55:40 +08:00 committed by Greg Kroah-Hartman
parent 95f432c0a3
commit 55bfe125b4
1 changed files with 3 additions and 4 deletions
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7
drivers/infiniband/hw/hns/hns_roce_hw_v2.c
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@ -1232,7 +1232,7 @@ static int __hns_roce_cmq_send(struct hns_roce_dev *hr_dev,
u32 timeout = 0;
int handle = 0;
u16 desc_ret;
int ret = 0;
int ret;
int ntc;
spin_lock_bh(&csq->lock);
@ -1277,15 +1277,14 @@ static int __hns_roce_cmq_send(struct hns_roce_dev *hr_dev,
if (hns_roce_cmq_csq_done(hr_dev)) {
complete = true;
handle = 0;
ret = 0;
while (handle < num) {
/* get the result of hardware write back */
desc_to_use = &csq->desc[ntc];
desc[handle] = *desc_to_use;
dev_dbg(hr_dev->dev, "Get cmq desc:\n");
desc_ret = le16_to_cpu(desc[handle].retval);
if (desc_ret == CMD_EXEC_SUCCESS)
ret = 0;
else
if (unlikely(desc_ret != CMD_EXEC_SUCCESS))
ret = -EIO;
priv->cmq.last_status = desc_ret;
ntc++;