[PATCH 4.19 255/321] RDMA/hns: Fix the bug with updating rq head pointer when flush cqe

Greg Kroah-Hartman
2019-12-03T22:56:58Z

From: Lijun Ou <oulijun@huawei.com>

[ Upstream commit 9c6ccc035c209dda07685e8dba829a203ba17499 ]

When flush cqe with srq, the driver disable to update the rq head pointer
into the hardware.

Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 10 +++++++---
1 file changed, 7 insertions(+), 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 9e7923cf85773..1eda8a22a4252 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -3503,13 +3503,16 @@ static int hns_roce_v2_modify_qp(struct ib_qp *ibqp,
roce_set_field(qpc_mask->byte_160_sq_ci_pi,
V2_QPC_BYTE_160_SQ_PRODUCER_IDX_M,
V2_QPC_BYTE_160_SQ_PRODUCER_IDX_S, 0);
- roce_set_field(context->byte_84_rq_ci_pi,
+
+ if (!ibqp->srq) {
+ roce_set_field(context->byte_84_rq_ci_pi,
V2_QPC_BYTE_84_RQ_PRODUCER_IDX_M,
V2_QPC_BYTE_84_RQ_PRODUCER_IDX_S,
hr_qp->rq.head);
- roce_set_field(qpc_mask->byte_84_rq_ci_pi,
+ roce_set_field(qpc_mask->byte_84_rq_ci_pi,
V2_QPC_BYTE_84_RQ_PRODUCER_IDX_M,
V2_QPC_BYTE_84_RQ_PRODUCER_IDX_S, 0);
+ }
}

if (attr_mask & IB_QP_AV) {
@@ -3971,7 +3974,8 @@ static void hns_roce_set_qps_to_err(struct hns_roce_dev *hr_dev, u32 qpn)
if (hr_qp->ibqp.uobject) {
if (hr_qp->sdb_en == 1) {
hr_qp->sq.head = *(int *)(hr_qp->sdb.virt_addr);
- hr_qp->rq.head = *(int *)(hr_qp->rdb.virt_addr);
+ if (hr_qp->rdb_en == 1)
+ hr_qp->rq.head = *(int *)(hr_qp->rdb.virt_addr);
} else {
dev_warn(hr_dev->dev, "flush cqe is unsupported in userspace!\n");
return;
--
2.20.1