This is a note to let you know that I've just added the patch titled
RDMA/hns: Check atomic wr length
to the 6.1-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-check-atomic-wr-length.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit bb58a2f45d01e356a3675bbf829a5498e46e45fc
Author: Junxian Huang <huangjunxian6@xxxxxxxxxxxxx>
Date: Wed Jul 10 21:36:58 2024 +0800
RDMA/hns: Check atomic wr length
[ Upstream commit 6afa2c0bfb8ef69f65715ae059e5bd5f9bbaf03b ]
8 bytes is the only supported length of atomic. Add this check in
set_rc_wqe(). Besides, stop processing WQEs and return from
set_rc_wqe() if there is any error.
Fixes: 384f88185112 ("RDMA/hns: Add atomic support")
Signed-off-by: Junxian Huang <huangjunxian6@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240710133705.896445-2-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_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h
index 8748b65c87ea7..0a4c046cdfac4 100644
--- a/drivers/infiniband/hw/hns/hns_roce_device.h
+++ b/drivers/infiniband/hw/hns/hns_roce_device.h
@@ -90,6 +90,8 @@
/* Configure to HW for PAGE_SIZE larger than 4KB */
#define PG_SHIFT_OFFSET (PAGE_SHIFT - 12)
+#define ATOMIC_WR_LEN 8
+
#define HNS_ROCE_IDX_QUE_ENTRY_SZ 4
#define SRQ_DB_REG 0x230
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index c931cce50d50d..176d75f2514eb 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -602,11 +602,16 @@ static inline int set_rc_wqe(struct hns_roce_qp *qp,
(wr->send_flags & IB_SEND_SIGNALED) ? 1 : 0);
if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
- wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD)
+ wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
+ if (msg_len != ATOMIC_WR_LEN)
+ return -EINVAL;
set_atomic_seg(wr, rc_sq_wqe, valid_num_sge);
- else if (wr->opcode != IB_WR_REG_MR)
+ } else if (wr->opcode != IB_WR_REG_MR) {
ret = set_rwqe_data_seg(&qp->ibqp, wr, rc_sq_wqe,
&curr_idx, valid_num_sge);
+ if (ret)
+ return ret;
+ }
/*
* The pipeline can sequentially post all valid WQEs into WQ buffer,
