From: Lijun Ou <oulijun@huawei.com>
Date: Fri, 31 May 2019 10:28:03 +0000 (+0800)
Subject: RDMA/hns: Bugfix for filling the sge of srq
X-Git-Tag: v5.4-rc1~555^2~143
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4f18904c78495ec16e271ee507709c626e61a62a;p=platform%2Fkernel%2Flinux-rpi.git

RDMA/hns: Bugfix for filling the sge of srq

When user post recv a srq with multiple sges, the hardware will get the
last correct sge and count the sge numbers according to the specific
identifier with lkey. For example, when the driver fills the sges with
every wr less than the max sge that the user configured when creating srq,
the hardware will stop getting the sge according to the specific lkey in
the sge. However, it will always end with the first sge in the current
post srq recv interface implementation.

Fixes: c7bcb13442e1 ("RDMA/hns: Add SRQ support for hip08 kernel mode")
Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
---

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index ac017c2..2d27dc9 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -6048,9 +6048,9 @@ static int hns_roce_v2_post_srq_recv(struct ib_srq *ibsrq,
 		}
 
 		if (i < srq->max_gs) {
-			dseg->len = 0;
-			dseg->lkey = cpu_to_le32(0x100);
-			dseg->addr = 0;
+			dseg[i].len = 0;
+			dseg[i].lkey = cpu_to_le32(0x100);
+			dseg[i].addr = 0;
 		}
 
 		srq->wrid[wqe_idx] = wr->wr_id;