From: Weihang Li <liweihang@huawei.com>
Date: Fri, 8 May 2020 17:45:54 +0800
Subject: RDMA/hns: Fix wrong assignment of SRQ's max_wr
Patch-mainline: v5.8-rc1
Git-commit: 6968aeb5aa64a46175f408fa91e49c19e9558428
References: jsc#SLE-14777
srq's attribute max_wr should be 1 less than the total count of wqe.
Fixes: ffb1308b88b6 ("RDMA/hns: Move SRQ code to the reasonable place")
Link: https://lore.kernel.org/r/1588931159-56875-5-git-send-email-liweihang@huawei.com
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -5044,8 +5044,8 @@ static int hns_roce_v2_query_srq(struct
SRQC_BYTE_8_SRQ_LIMIT_WL_S);
attr->srq_limit = limit_wl;
- attr->max_wr = srq->wqe_cnt;
- attr->max_sge = srq->max_gs;
+ attr->max_wr = srq->wqe_cnt - 1;
+ attr->max_sge = srq->max_gs;
memcpy(srq_context, mailbox->buf, sizeof(*srq_context));