From: Lang Cheng <chenglang@xxxxxxxxxx> All fields of WQE will be rewrote, so the memset is unnecessary. And when SQ is working in OWNER mode, the pipeline may prefetch the WQEs beyond PI, the memset operation may flip the owner bit too early, then the pipeline may get a wrong WQ. Signed-off-by: Lang Cheng <chenglang@xxxxxxxxxx> Signed-off-by: Weihang Li <liweihang@xxxxxxxxxx> --- drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c index 1bff432..55dfd44 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c @@ -467,7 +467,6 @@ static inline int set_ud_wqe(struct hns_roce_qp *qp, int ret; valid_num_sge = calc_wr_sge_num(wr, &msg_len); - memset(ud_sq_wqe, 0, sizeof(*ud_sq_wqe)); ret = set_ud_opcode(ud_sq_wqe, wr); if (WARN_ON(ret)) @@ -573,7 +572,6 @@ static inline int set_rc_wqe(struct hns_roce_qp *qp, int ret; valid_num_sge = calc_wr_sge_num(wr, &msg_len); - memset(rc_sq_wqe, 0, sizeof(*rc_sq_wqe)); rc_sq_wqe->msg_len = cpu_to_le32(msg_len); -- 2.8.1
