From: Yunsheng Lin <linyunsheng@huawei.com>
Date: Mon, 3 Sep 2018 11:21:53 +0100
Subject: net: hns3: Only update mac configuation when necessary
Patch-mainline: v4.20-rc1
Git-commit: 2d03eacc0b7e7aeedce6032f79872f3fd3d1a94f
References: bsc#1104353 FATE#326415

Currently only fiber port checks if it is necessay to set the
mac through firmware when link is changed, this patch unify the
checking to allow the copper port do the checking too.

Signed-off-by: Yunsheng Lin <linyunsheng@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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c |   48 ++++++++++------
 1 file changed, 31 insertions(+), 17 deletions(-)

--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -2066,19 +2066,17 @@ static int hclge_init_msi(struct hclge_d
 	return 0;
 }
 
-static void hclge_check_speed_dup(struct hclge_dev *hdev, int duplex, int speed)
+static u8 hclge_check_speed_dup(u8 duplex, int speed)
 {
-	struct hclge_mac *mac = &hdev->hw.mac;
 
-	if ((speed == HCLGE_MAC_SPEED_10M) || (speed == HCLGE_MAC_SPEED_100M))
-		mac->duplex = (u8)duplex;
-	else
-		mac->duplex = HCLGE_MAC_FULL;
+	if (!(speed == HCLGE_MAC_SPEED_10M || speed == HCLGE_MAC_SPEED_100M))
+		duplex = HCLGE_MAC_FULL;
 
-	mac->speed = speed;
+	return duplex;
 }
 
-int hclge_cfg_mac_speed_dup(struct hclge_dev *hdev, int speed, u8 duplex)
+static int hclge_cfg_mac_speed_dup_hw(struct hclge_dev *hdev, int speed,
+				      u8 duplex)
 {
 	struct hclge_config_mac_speed_dup_cmd *req;
 	struct hclge_desc desc;
@@ -2138,7 +2136,23 @@ int hclge_cfg_mac_speed_dup(struct hclge
 		return ret;
 	}
 
-	hclge_check_speed_dup(hdev, duplex, speed);
+	return 0;
+}
+
+int hclge_cfg_mac_speed_dup(struct hclge_dev *hdev, int speed, u8 duplex)
+{
+	int ret;
+
+	duplex = hclge_check_speed_dup(duplex, speed);
+	if (hdev->hw.mac.speed == speed && hdev->hw.mac.duplex == duplex)
+		return 0;
+
+	ret = hclge_cfg_mac_speed_dup_hw(hdev, speed, duplex);
+	if (ret)
+		return ret;
+
+	hdev->hw.mac.speed = speed;
+	hdev->hw.mac.duplex = duplex;
 
 	return 0;
 }
@@ -2259,7 +2273,9 @@ static int hclge_mac_init(struct hclge_d
 	int ret;
 	int i;
 
-	ret = hclge_cfg_mac_speed_dup(hdev, hdev->hw.mac.speed, HCLGE_MAC_FULL);
+	hdev->hw.mac.duplex = HCLGE_MAC_FULL;
+	ret = hclge_cfg_mac_speed_dup_hw(hdev, hdev->hw.mac.speed,
+					 hdev->hw.mac.duplex);
 	if (ret) {
 		dev_err(&hdev->pdev->dev,
 			"Config mac speed dup fail ret=%d\n", ret);
@@ -2415,13 +2431,11 @@ static int hclge_update_speed_duplex(str
 		return ret;
 	}
 
-	if ((mac.speed != speed) || (mac.duplex != duplex)) {
-		ret = hclge_cfg_mac_speed_dup(hdev, speed, duplex);
-		if (ret) {
-			dev_err(&hdev->pdev->dev,
-				"mac speed/duplex config failed %d\n", ret);
-			return ret;
-		}
+	ret = hclge_cfg_mac_speed_dup(hdev, speed, duplex);
+	if (ret) {
+		dev_err(&hdev->pdev->dev,
+			"mac speed/duplex config failed %d\n", ret);
+		return ret;
 	}
 
 	return 0;