From 531eb45b3da4267fc2a64233ba256c8ffb02edd2 Mon Sep 17 00:00:00 2001
From: Sirong Wang <wangsirong@huawei.com>
Date: Fri, 1 Nov 2019 10:33:29 +0800
Subject: [PATCH 1/1] RDMA/hns: Correct the value of HNS_ROCE_HEM_CHUNK_LEN
Git-commit: 531eb45b3da4267fc2a64233ba256c8ffb02edd2
Patch-mainline: v5.10-rc1
References: bsc#1111666
Size of pointer to buf field of struct hns_roce_hem_chunk should be
considered when calculating HNS_ROCE_HEM_CHUNK_LEN, or sg table size will
be larger than expected when allocating hem.
Fixes: 9a4435375cd1 ("IB/hns: Add driver files for hns RoCE driver")
Link: https://lore.kernel.org/r/1572575610-52530-2-git-send-email-liweihang@hisilicon.com
Signed-off-by: Sirong Wang <wangsirong@huawei.com>
Signed-off-by: Weihang Li <liweihang@hisilicon.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Nicolas Morey-Chaisemartin <nmoreychaisemartin@suse.com>
---
drivers/infiniband/hw/hns/hns_roce_hem.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/hns/hns_roce_hem.h b/drivers/infiniband/hw/hns/hns_roce_hem.h
index 86783276fb1f..3bb8f78fb7b0 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hem.h
+++ b/drivers/infiniband/hw/hns/hns_roce_hem.h
@@ -59,7 +59,7 @@ enum {
#define HNS_ROCE_HEM_CHUNK_LEN \
((256 - sizeof(struct list_head) - 2 * sizeof(int)) / \
- (sizeof(struct scatterlist)))
+ (sizeof(struct scatterlist) + sizeof(void *)))
#define check_whether_bt_num_3(type, hop_num) \
(type < HEM_TYPE_MTT && hop_num == 2)
--
2.26.2