diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c
index 0942e4916d9d..3d07c8a7639d 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c
@@ -83,8 +83,9 @@ static int hns_ppe_common_get_cfg(struct dsaf_device *dsaf_dev, int comm_index)
 	else
 		ppe_num = HNS_PPE_DEBUG_NW_ENGINE_NUM;
 
-	ppe_common = devm_kzalloc(dsaf_dev->dev, sizeof(*ppe_common) +
-		ppe_num * sizeof(struct hns_ppe_cb), GFP_KERNEL);
+	ppe_common = devm_kzalloc(dsaf_dev->dev,
+				  struct_size(ppe_common, ppe_cb, ppe_num),
+				  GFP_KERNEL);
 	if (!ppe_common)
 		return -ENOMEM;