From: Yixing Liu <liuyixing1@xxxxxxxxxx>
[ Upstream commit 9bed8a70716ba65d300b9cc30eb7e0276353f7bf ]
In RNR NAK screnario, according to the specification, when no credit is
available, only the first fragment of the send request can be sent. The
LSN(Limit Sequence Number) field should be 0 or the entire packet will be
resent.
Fixes: 926a01dc000d ("RDMA/hns: Add QP operations support for hip08 SoC")
Link: https://lore.kernel.org/r/1629883169-2306-1-git-send-email-liangwenpeng@xxxxxxxxxx
Signed-off-by: Yixing Liu <liuyixing1@xxxxxxxxxx>
Signed-off-by: Wenpeng Liang <liangwenpeng@xxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index 0e0be5664137..f4cea6dcec2f 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -4489,9 +4489,6 @@ static int modify_qp_rtr_to_rts(struct ib_qp *ibqp,
hr_reg_clear(qpc_mask, QPC_CHECK_FLG);
- hr_reg_write(context, QPC_LSN, 0x100);
- hr_reg_clear(qpc_mask, QPC_LSN);
-
hr_reg_clear(qpc_mask, QPC_V2_IRRL_HEAD);
return 0;
--
2.30.2
