diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index e404130a5114..fc27f3fe0c5e 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -2176,6 +2176,8 @@ static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
 		     l4_type == HNS3_L4_TYPE_SCTP))
 			skb->ip_summed = CHECKSUM_UNNECESSARY;
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
index ce2e6ea11bb7..46701cf256db 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
@@ -351,9 +351,10 @@ static int hns3_get_sset_count(struct net_device *netdev, int stringset)
 
 	case ETH_SS_TEST:
 		return ops->get_sset_count(h, stringset);
-	}
 
-	return 0;
+	default:
+		return -EOPNOTSUPP;
+	}
 }
 
 static void *hns3_update_strings(u8 *data, const struct hns3_stats *stats,
@@ -417,6 +418,8 @@ static void hns3_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 	case ETH_SS_TEST:
 		ops->get_strings(h, stringset, data);
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 86d3d8b6fd2b..73d9d0d349d8 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -2224,6 +2224,8 @@ static void hclge_clear_event_cause(struct hclge_dev *hdev, u32 event_type,
 	case HCLGE_VECTOR0_EVENT_MBX:
 		hclge_write_dev(&hdev->hw, HCLGE_VECTOR0_CMDQ_SRC_REG, regclr);
 		break;
+	default:
+		break;
 	}
 }
 
@@ -5218,6 +5220,10 @@ static int hclge_init_client_instance(struct hnae3_client *client,
 
 				hnae3_set_client_init_flag(client, ae_dev, 1);
 			}
+
+			break;
+		default:
+			return -EINVAL;
 		}
 	}
 
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_cmd.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_cmd.c
index d8c0cc8e04c9..0d3b445f6799 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_cmd.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_cmd.c
@@ -134,7 +134,7 @@ static int hclgevf_init_cmd_queue(struct hclgevf_dev *hdev,
 
 		hclgevf_write_dev(hw, HCLGEVF_NIC_CSQ_HEAD_REG, 0);
 		hclgevf_write_dev(hw, HCLGEVF_NIC_CSQ_TAIL_REG, 0);
-		break;
+		return 0;
 	case HCLGEVF_TYPE_CRQ:
 		reg_val = (u32)ring->desc_dma_addr;
 		hclgevf_write_dev(hw, HCLGEVF_NIC_CRQ_BASEADDR_L_REG, reg_val);
@@ -147,10 +147,10 @@ static int hclgevf_init_cmd_queue(struct hclgevf_dev *hdev,
 
 		hclgevf_write_dev(hw, HCLGEVF_NIC_CRQ_HEAD_REG, 0);
 		hclgevf_write_dev(hw, HCLGEVF_NIC_CRQ_TAIL_REG, 0);
-		break;
+		return 0;
+	default:
+		return -EINVAL;
 	}
-
-	return 0;
 }
 
 void hclgevf_cmd_setup_basic_desc(struct hclgevf_desc *desc,
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
index 84129c58e6fa..b64418763b13 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
@@ -1667,6 +1667,9 @@ static int hclgevf_init_client_instance(struct hnae3_client *client,
 		}
 
 		hnae3_set_client_init_flag(client, ae_dev, 1);
+		break;
+	default:
+		return -EINVAL;
 	}
 
 	return 0;