From: Jiaran Zhang <zhangjiaran@xxxxxxxxxx>
calc_pg_sz() may gets a data calculation overflow if the PAGE_SIZE is 64 KB
and hop_num is 2. It is because that all variables involved in calculation
are defined in type of int. So change the type of bt_chunk_size,
buf_chunk_size and obj_per_chunk_default to u64.
Fixes: ba6bb7e97421 ("RDMA/hns: Add interfaces to get pf capabilities from firmware")
Signed-off-by: Jiaran Zhang <zhangjiaran@xxxxxxxxxx>
Signed-off-by: Weihang Li <liweihang@xxxxxxxxxx>
---
drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 6 +++---
1 file changed, 3 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 01aabb7..af2dea1 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -1804,9 +1804,9 @@ static void calc_pg_sz(int obj_num, int obj_size, int hop_num, int ctx_bt_num,
int *buf_page_size, int *bt_page_size, u32 hem_type)
{
u64 obj_per_chunk;
- int bt_chunk_size = 1 << PAGE_SHIFT;
- int buf_chunk_size = 1 << PAGE_SHIFT;
- int obj_per_chunk_default = buf_chunk_size / obj_size;
+ u64 bt_chunk_size = 1 << PAGE_SHIFT;
+ u64 buf_chunk_size = 1 << PAGE_SHIFT;
+ u64 obj_per_chunk_default = buf_chunk_size / obj_size;
*buf_page_size = 0;
*bt_page_size = 0;
--
2.8.1
