net: hns3: Fix ets validate issue

There is a defect in hclge_ets_validate(). If each member of tc_tsa is
not IEEE_8021QAZ_TSA_ETS, the variable total_ets_bw won't be updated.
In this case, the check for value of total_ets_bw will fail. This patch
fixes it by checking total_ets_bw only after it has been updated.

Fixes: cacde272 ("net: hns3: Add hclge_dcb module for the support of DCB feature")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c

@@ -73,6 +73,7 @@ static int hclge_ieee_getets(struct hnae3_handle *h, struct ieee_ets *ets)
 static int hclge_ets_validate(struct hclge_dev *hdev, struct ieee_ets *ets,
 			      u8 *tc, bool *changed)
 {
+	bool has_ets_tc = false;
 	u32 total_ets_bw = 0;
 	u8 max_tc = 0;
 	u8 i;
@@ -100,13 +101,14 @@ static int hclge_ets_validate(struct hclge_dev *hdev, struct ieee_ets *ets,
 				*changed = true;
 
 			total_ets_bw += ets->tc_tx_bw[i];
+			has_ets_tc = true;
 			break;
 		default:
 			return -EINVAL;
 		}
 	}
 
-	if (total_ets_bw != BW_PERCENT)
+	if (has_ets_tc && total_ets_bw != BW_PERCENT)
 		return -EINVAL;
 
 	*tc = max_tc + 1;