net: hns3: refactor out hclgevf_set_rss_tuple()

To make it more readable and maintainable, split
hclgevf_set_rss_tuple() into two parts.
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c

@@ -873,25 +873,13 @@ static u8 hclgevf_get_rss_hash_bits(struct ethtool_rxnfc *nfc)
 	return hash_sets;
 }
 
-static int hclgevf_set_rss_tuple(struct hnae3_handle *handle,
-				 struct ethtool_rxnfc *nfc)
+static int hclgevf_init_rss_tuple_cmd(struct hnae3_handle *handle,
+				      struct ethtool_rxnfc *nfc,
+				      struct hclgevf_rss_input_tuple_cmd *req)
 {
 	struct hclgevf_dev *hdev = hclgevf_ae_get_hdev(handle);
 	struct hclgevf_rss_cfg *rss_cfg = &hdev->rss_cfg;
-	struct hclgevf_rss_input_tuple_cmd *req;
-	struct hclgevf_desc desc;
 	u8 tuple_sets;
-	int ret;
-
-	if (hdev->ae_dev->dev_version < HNAE3_DEVICE_VERSION_V2)
-		return -EOPNOTSUPP;
-
-	if (nfc->data &
-	    ~(RXH_IP_SRC | RXH_IP_DST | RXH_L4_B_0_1 | RXH_L4_B_2_3))
-		return -EINVAL;
-
-	req = (struct hclgevf_rss_input_tuple_cmd *)desc.data;
-	hclgevf_cmd_setup_basic_desc(&desc, HCLGEVF_OPC_RSS_INPUT_TUPLE, false);
 
 	req->ipv4_tcp_en = rss_cfg->rss_tuple_sets.ipv4_tcp_en;
 	req->ipv4_udp_en = rss_cfg->rss_tuple_sets.ipv4_udp_en;
@@ -936,6 +924,35 @@ static int hclgevf_set_rss_tuple(struct hnae3_handle *handle,
 		return -EINVAL;
 	}
 
+	return 0;
+}
+
+static int hclgevf_set_rss_tuple(struct hnae3_handle *handle,
+				 struct ethtool_rxnfc *nfc)
+{
+	struct hclgevf_dev *hdev = hclgevf_ae_get_hdev(handle);
+	struct hclgevf_rss_cfg *rss_cfg = &hdev->rss_cfg;
+	struct hclgevf_rss_input_tuple_cmd *req;
+	struct hclgevf_desc desc;
+	int ret;
+
+	if (hdev->ae_dev->dev_version < HNAE3_DEVICE_VERSION_V2)
+		return -EOPNOTSUPP;
+
+	if (nfc->data &
+	    ~(RXH_IP_SRC | RXH_IP_DST | RXH_L4_B_0_1 | RXH_L4_B_2_3))
+		return -EINVAL;
+
+	req = (struct hclgevf_rss_input_tuple_cmd *)desc.data;
+	hclgevf_cmd_setup_basic_desc(&desc, HCLGEVF_OPC_RSS_INPUT_TUPLE, false);
+
+	ret = hclgevf_init_rss_tuple_cmd(handle, nfc, req);
+	if (ret) {
+		dev_err(&hdev->pdev->dev,
+			"failed to init rss tuple cmd, ret = %d\n", ret);
+		return ret;
+	}
+
 	ret = hclgevf_cmd_send(&hdev->hw, &desc, 1);
 	if (ret) {
 		dev_err(&hdev->pdev->dev,