From: wenglianfa wenglianfa@huawei.com
driver inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IATYMO
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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@huawei.com Signed-off-by: Junxian Huang huangjunxian6@hisilicon.com Link: https://patch.msgid.link/20240906093444.3571619-5-huangjunxian6@hisilicon.co... Signed-off-by: Leon Romanovsky leon@kernel.org Signed-off-by: Xinghai Cen cenxinghai@h-partners.com --- 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 1958987e503b..cdb231e16fe2 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hem.c +++ b/drivers/infiniband/hw/hns/hns_roce_hem.c @@ -1042,9 +1042,9 @@ 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;
@@ -1080,7 +1080,7 @@ 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++) { @@ -1111,7 +1111,7 @@ 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) @@ -1150,7 +1150,7 @@ 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) { @@ -1238,7 +1238,7 @@ 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)