netdev: octeon_mgmt: Improve ethtool_ops.

Correctly show no link when the interface is down, and return
-EOPNOTSUPP for things that don't work.  This quiets the ethtool
program when run on down interfaces.

Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: David S. Miller <davem@davemloft.net>

1 files changed, 18 insertions, 4 deletions

diff --git a/drivers/net/ethernet/octeon/octeon_mgmt.c b/drivers/net/ethernet/octeon/octeon_mgmt.c
index 687a6a0c7147..cf06cf23935e 100644
--- a/drivers/net/ethernet/octeon/octeon_mgmt.c
+++ b/drivers/net/ethernet/octeon/octeon_mgmt.c
@@ -1379,7 +1379,7 @@ static int octeon_mgmt_get_settings(struct net_device *netdev,
         if (p->phydev)
                 return phy_ethtool_gset(p->phydev, cmd);
 
-        return -EINVAL;
+        return -EOPNOTSUPP;
 }
 
 static int octeon_mgmt_set_settings(struct net_device *netdev,
@@ -1393,14 +1393,28 @@ static int octeon_mgmt_set_settings(struct net_device *netdev,
         if (p->phydev)
                 return phy_ethtool_sset(p->phydev, cmd);
 
-        return -EINVAL;
+        return -EOPNOTSUPP;
+}
+
+static int octeon_mgmt_nway_reset(struct net_device *dev)
+{
+        struct octeon_mgmt *p = netdev_priv(dev);
+
+        if (!capable(CAP_NET_ADMIN))
+                return -EPERM;
+
+        if (p->phydev)
+                return phy_start_aneg(p->phydev);
+
+        return -EOPNOTSUPP;
 }
 
 static const struct ethtool_ops octeon_mgmt_ethtool_ops = {
         .get_drvinfo = octeon_mgmt_get_drvinfo,
-        .get_link = ethtool_op_get_link,
         .get_settings = octeon_mgmt_get_settings,
-        .set_settings = octeon_mgmt_set_settings
+        .set_settings = octeon_mgmt_set_settings,
+        .nway_reset = octeon_mgmt_nway_reset,
+        .get_link = ethtool_op_get_link,
 };
 
 static const struct net_device_ops octeon_mgmt_ops = {