[SRU][J:linux-bluefield][PATCH v1 1/1] UBUNTU: SAUCE: mlxbf_gige: Ethtool speed does not update based on link status

[Chris Babroski]

BugLink: https://bugs.launchpad.net/bugs/2116284

The "Speed" and "Duplex" fields displayed by ethtool should report
"Unknown" when the link is down. Create a mlxbf_gige ethtool_ops
get_link_ksettings operation that updates the speed and duplex value
reported to ethtool as expected.

Signed-off-by: Chris Babroski <cbabroski at nvidia.com>
Reviewed-by: David Thompson <davthompson at nvidia.com>
Reviewed-by: Asmaa Mnebhi <asmaa at nvidia.com>
---
 .../mellanox/mlxbf_gige/mlxbf_gige_ethtool.c  | 26 ++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_ethtool.c b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_ethtool.c
index 05d338d479dc..4d6dfc495bc2 100644
--- a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_ethtool.c
@@ -193,6 +193,30 @@ static void mlxbf_gige_get_pause_stats(struct net_device *netdev,
 	}
 }
 
+static int mlxbf_gige_get_link_ksettings(struct net_device *ndev,
+					 struct ethtool_link_ksettings *cmd)
+{
+	struct phy_device *phydev;
+	int ret;
+
+	ret = phy_ethtool_get_link_ksettings(ndev, cmd);
+	if (ret)
+		return ret;
+
+	phydev = ndev->phydev;
+	if (!phydev)
+		return -ENODEV;
+
+	mutex_lock(&phydev->lock);
+	if (!phydev->link) {
+		cmd->base.speed = SPEED_UNKNOWN;
+		cmd->base.duplex = DUPLEX_UNKNOWN;
+	}
+	mutex_unlock(&phydev->lock);
+
+	return 0;
+}
+
 static u32 mlxbf_gige_get_msglevel(struct net_device *netdev)
 {
 	struct mlxbf_gige *priv = netdev_priv(netdev);
@@ -217,7 +241,7 @@ const struct ethtool_ops mlxbf_gige_ethtool_ops = {
 	.nway_reset		= phy_ethtool_nway_reset,
 	.get_pauseparam		= mlxbf_gige_get_pauseparam,
 	.get_pause_stats	= mlxbf_gige_get_pause_stats,
-	.get_link_ksettings	= phy_ethtool_get_link_ksettings,
+	.get_link_ksettings	= mlxbf_gige_get_link_ksettings,
 	.set_link_ksettings	= phy_ethtool_set_link_ksettings,
 	.get_msglevel		= mlxbf_gige_get_msglevel,
 	.set_msglevel		= mlxbf_gige_set_msglevel,
-- 
2.34.1