This is a note to let you know that I've just added the patch titled
RDMA/hns: Fixes missing error code of CMDQ
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rdma-hns-fixes-missing-error-code-of-cmdq.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4a1d9b61cbb93302c9a7328d38f74377b782fa7e
Author: Lang Cheng <chenglang@xxxxxxxxxx>
Date: Sun Feb 7 16:55:40 2021 +0800
RDMA/hns: Fixes missing error code of CMDQ
[ 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: a04ff739f2a9 ("RDMA/hns: Add command queue support for hip08 RoCE driver")
Link: https://lore.kernel.org/r/1612688143-28226-3-git-send-email-liweihang@xxxxxxxxxx
Signed-off-by: Lang Cheng <chenglang@xxxxxxxxxx>
Signed-off-by: Weihang Li <liweihang@xxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index e8933daab4995..d01e3222c00cf 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -1009,7 +1009,7 @@ 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);
@@ -1054,15 +1054,14 @@ 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++;
