6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: wenglianfa <wenglianfa@xxxxxxxxxx> [ Upstream commit d586628b169d14bbf36be64d2b3ec9d9d2fe0432 ] The max value of 'unit' and 'hop_num' is 2^24 and 2, so the value of 'step' may exceed the range of u32. Change the type of 'step' to u64. Fixes: 38389eaa4db1 ("RDMA/hns: Add mtr support for mixed multihop addressing") Signed-off-by: wenglianfa <wenglianfa@xxxxxxxxxx> Signed-off-by: Junxian Huang <huangjunxian6@xxxxxxxxxxxxx> Link: https://patch.msgid.link/20240906093444.3571619-5-huangjunxian6@xxxxxxxxxxxxx Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/infiniband/hw/hns/hns_roce_hem.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/infiniband/hw/hns/hns_roce_hem.c b/drivers/infiniband/hw/hns/hns_roce_hem.c index c4ac06a338696..a429d95a387cd 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hem.c +++ b/drivers/infiniband/hw/hns/hns_roce_hem.c @@ -1098,9 +1098,9 @@ static bool hem_list_is_bottom_bt(int hopnum, int bt_level) * @bt_level: base address table level * @unit: ba entries per bt page */ -static u32 hem_list_calc_ba_range(int hopnum, int bt_level, int unit) +static u64 hem_list_calc_ba_range(int hopnum, int bt_level, int unit) { - u32 step; + u64 step; int max; int i; @@ -1136,7 +1136,7 @@ int hns_roce_hem_list_calc_root_ba(const struct hns_roce_buf_region *regions, { struct hns_roce_buf_region *r; int total = 0; - int step; + u64 step; int i; for (i = 0; i < region_cnt; i++) { @@ -1167,7 +1167,7 @@ static int hem_list_alloc_mid_bt(struct hns_roce_dev *hr_dev, int ret = 0; int max_ofs; int level; - u32 step; + u64 step; int end; if (hopnum <= 1) @@ -1204,7 +1204,7 @@ static int hem_list_alloc_mid_bt(struct hns_roce_dev *hr_dev, } start_aligned = (distance / step) * step + r->offset; - end = min_t(int, start_aligned + step - 1, max_ofs); + end = min_t(u64, start_aligned + step - 1, max_ofs); cur = hem_list_alloc_item(hr_dev, start_aligned, end, unit, true); if (!cur) { @@ -1293,7 +1293,7 @@ static int setup_middle_bt(struct hns_roce_dev *hr_dev, void *cpu_base, struct hns_roce_hem_item *hem, *temp_hem; int total = 0; int offset; - int step; + u64 step; step = hem_list_calc_ba_range(r->hopnum, 1, unit); if (step < 1) -- 2.43.0