[PATCH 6.1 0674/1146] RDMA/hns: Fix page size cap from firmware

Greg Kroah-Hartman
2022-12-28T16:21:05Z

From: Chengchang Tang <tangchengchang@huawei.com>

[ Upstream commit 99dc5a0712883d5d13b620d25b3759d429577bc8 ]

Add verification to make sure the roce page size cap is supported by the
system page size.

Fixes: ba6bb7e97421 ("RDMA/hns: Add interfaces to get pf capabilities from firmware")
Link: https://lore.kernel.org/r/20221126102911.2921820-5-xuhaoyue1@hisilicon.com
Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Haoyue Xu <xuhaoyue1@hisilicon.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index 747ce3ac72f1..fbdaf95fd82b 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -2341,6 +2341,9 @@ static int hns_roce_query_pf_caps(struct hns_roce_dev *hr_dev)
caps->wqe_sge_hop_num = hr_reg_read(resp_d, PF_CAPS_D_EX_SGE_HOP_NUM);
caps->wqe_rq_hop_num = hr_reg_read(resp_d, PF_CAPS_D_RQWQE_HOP_NUM);

+ if (!(caps->page_size_cap & PAGE_SIZE))
+ caps->page_size_cap = HNS_ROCE_V2_PAGE_SIZE_SUPPORTED;
+
return 0;
}

--
2.35.1