From: o00290482 <o00290482@xxxxxxxxxx>
The buffer size of qp which used to allocate qp buffer space for
storing sqwqe and rqwqe will be the length of buffer space. The
kernel driver will use the buffer address and the same size to
get the user memory. The same size named buff_size of qp. According
the algorithm of calculating, The size of the two is not equal
when users set the max sge of sq.
Fixes: b28ca7cceff8 ("RDMA/hns: Limit extend sq sge num")
Signed-off-by: Lijun Ou <oulijun@xxxxxxxxxx>
---
drivers/infiniband/hw/hns/hns_roce_qp.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/infiniband/hw/hns/hns_roce_qp.c b/drivers/infiniband/hw/hns/hns_roce_qp.c
index 305be42..d56c03d 100644
--- a/drivers/infiniband/hw/hns/hns_roce_qp.c
+++ b/drivers/infiniband/hw/hns/hns_roce_qp.c
@@ -392,8 +392,8 @@ static int hns_roce_set_user_sq_size(struct hns_roce_dev *hr_dev,
hr_qp->sq.wqe_shift), PAGE_SIZE);
} else {
page_size = 1 << (hr_dev->caps.mtt_buf_pg_sz + PAGE_SHIFT);
- hr_qp->sge.sge_cnt =
- max(page_size / (1 << hr_qp->sge.sge_shift), ex_sge_num);
+ hr_qp->sge.sge_cnt = ex_sge_num ?
+ max(page_size / (1 << hr_qp->sge.sge_shift), ex_sge_num) : 0;
hr_qp->buff_size = HNS_ROCE_ALOGN_UP((hr_qp->rq.wqe_cnt <<
hr_qp->rq.wqe_shift), page_size) +
HNS_ROCE_ALOGN_UP((hr_qp->sge.sge_cnt <<
--
1.9.1
