Commit 3110a53b authored by Yixing Liu's avatar Yixing Liu Committed by Zheng Zengkai
Browse files

RDMA/hns: Fix incorrect lsn field 

mainline inclusion
from mainline-v5.15-rc1
commit 9bed8a70
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4QOTS
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git/commit/?id=9bed8a70716ba65d300b9cc30eb7e0276353f7bf

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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: 926a01dc ("RDMA/hns: Add QP operations support for hip08 SoC")
Link: https://lore.kernel.org/r/1629883169-2306-1-git-send-email-liangwenpeng@huawei.com


Signed-off-by: default avatarYixing Liu <liuyixing1@huawei.com>
Signed-off-by: default avatarWenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@nvidia.com>
sigend-off-by: default avatarGuofeng Yue <yueguofeng@hisilicon.com>

Reviewed-by: default avatarYangyang Li <liyangyang20@huawei.com>
Acked-by: default avatarXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parent 57382e3e

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

+0 −3
Original line number Diff line number Diff line
@@ -4475,9 +4475,6 @@ 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;