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Commit e0222d18 authored by Lijun Ou's avatar Lijun Ou Committed by Jason Gunthorpe
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RDMA/hns: Bugfix for calculating qp buffer size 



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: b28ca7cc ("RDMA/hns: Limit extend sq sge num")
Signed-off-by: default avatarLijun Ou <oulijun@huawei.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
parent 726be12f

drivers/infiniband/hw/hns/hns_roce_qp.c

+2 −2
Original line number Diff line number Diff line
@@ -387,8 +387,8 @@ 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 <<