This is a note to let you know that I've just added the patch titled
RDMA/hns: Fix warning storm caused by invalid input in IO path
to the 6.6-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-fix-warning-storm-caused-by-invalid-input-i.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 447418ac54a63a2b5032d2c99feffc15ebb6f065
Author: Chengchang Tang <tangchengchang@xxxxxxxxxx>
Date: Fri Dec 20 13:52:48 2024 +0800
RDMA/hns: Fix warning storm caused by invalid input in IO path
[ Upstream commit fa5c4ba8cdbfd2c2d6422e001311c8213283ebbf ]
WARN_ON() is called in the IO path. And it could lead to a warning
storm. Use WARN_ON_ONCE() instead of WARN_ON().
Fixes: 12542f1de179 ("RDMA/hns: Refactor process about opcode in post_send()")
Signed-off-by: Chengchang Tang <tangchengchang@xxxxxxxxxx>
Signed-off-by: Junxian Huang <huangjunxian6@xxxxxxxxxxxxx>
Link: https://patch.msgid.link/20241220055249.146943-4-huangjunxian6@xxxxxxxxxxxxx
Signed-off-by: Leon Romanovsky <leon@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 aed9c403f3be..c9c9be122471 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -471,7 +471,7 @@ static inline int set_ud_wqe(struct hns_roce_qp *qp,
valid_num_sge = calc_wr_sge_num(wr, &msg_len);
ret = set_ud_opcode(ud_sq_wqe, wr);
- if (WARN_ON(ret))
+ if (WARN_ON_ONCE(ret))
return ret;
ud_sq_wqe->msg_len = cpu_to_le32(msg_len);
@@ -575,7 +575,7 @@ static inline int set_rc_wqe(struct hns_roce_qp *qp,
rc_sq_wqe->msg_len = cpu_to_le32(msg_len);
ret = set_rc_opcode(hr_dev, rc_sq_wqe, wr);
- if (WARN_ON(ret))
+ if (WARN_ON_ONCE(ret))
return ret;
hr_reg_write(rc_sq_wqe, RC_SEND_WQE_SO,
