[PATCH 1/4][D/E] net: hns3: fix port setting handle for fibre port

[Ike Panhc]

From: Guangbin Huang <huangguangbin2 at huawei.com>

BugLink: https://launchpad.net/bugs/1853984

For hardware doesn't support use specified speed and duplex
to negotiate, it's unnecessary to check and modify the port
speed and duplex for fibre port when autoneg is on.

Fixes: 22f48e24a23d ("net: hns3: add autoneg and change speed support for fibre port")
Signed-off-by: Guangbin Huang <huangguangbin2 at huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong at huawei.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
(cherry picked from commit 24283ece5a0f1040842367966c8e0245b871e309)
Signed-off-by: Ike Panhc <ike.pan at canonical.com>
---
 .../net/ethernet/hisilicon/hns3/hns3_ethtool.c    | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
index 0998647da15d..dddb0ccc2ee8 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
@@ -684,6 +684,12 @@ static int hns3_check_ksettings_param(struct net_device *netdev,
 	u8 duplex;
 	int ret;
 
+	/* hw doesn't support use specified speed and duplex to negotiate,
+	 * unnecessary to check them when autoneg on.
+	 */
+	if (cmd->base.autoneg)
+		return 0;
+
 	if (ops->get_ksettings_an_result) {
 		ops->get_ksettings_an_result(handle, &autoneg, &speed, &duplex);
 		if (cmd->base.autoneg == autoneg && cmd->base.speed == speed &&
@@ -740,6 +746,15 @@ static int hns3_set_link_ksettings(struct net_device *netdev,
 			return ret;
 	}
 
+	/* hw doesn't support use specified speed and duplex to negotiate,
+	 * ignore them when autoneg on.
+	 */
+	if (cmd->base.autoneg) {
+		netdev_info(netdev,
+			    "autoneg is on, ignore the speed and duplex\n");
+		return 0;
+	}
+
 	if (ops->cfg_mac_speed_dup_h)
 		ret = ops->cfg_mac_speed_dup_h(handle, cmd->base.speed,
 					       cmd->base.duplex);
-- 
2.17.1