net/mlx4_en: Use ethtool cmd->autoneg as a hint for ethtool set settings

Use cmd->autoneg as a user hint to decide what to set in ethtool set settings callback.
When cmd->autoneg == AUTONEG_ENABLE set according to ethtool->advertise otherwise,
set according to ethtool->speed.

Usage:
	- ethtool -s eth<x> speed 56000 autoneg off
	- ethtool -s eth<x> advertise 0x800000 autoneg on

While we're here:
	- Move proto_admin masking outcome check to be adjacent to the operation.
	- Move en_warn("port reset..") print to "port reset" block.

Fixes: 312df74 ("net/mlx4_en: mlx4_en_set_settings() always fails when autoneg is set")
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
index 569eda9..a7b58ba 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
@@ -770,22 +770,20 @@ static int mlx4_en_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
                return 0;
        }
 
-       proto_admin = cpu_to_be32(ptys_adv);
-       if (speed >= 0 && speed != priv->port_state.link_speed)
-               /* If speed was set then speed decides :-) */
-               proto_admin = speed_set_ptys_admin(priv, speed,
-                                                  ptys_reg.eth_proto_cap);
+       proto_admin = cmd->autoneg == AUTONEG_ENABLE ?
+               cpu_to_be32(ptys_adv) :
+               speed_set_ptys_admin(priv, speed,
+                                    ptys_reg.eth_proto_cap);
 
        proto_admin &= ptys_reg.eth_proto_cap;
-
-       if (proto_admin == ptys_reg.eth_proto_admin)
-               return 0; /* Nothing to change */
-
        if (!proto_admin) {
                en_warn(priv, "Not supported link mode(s) requested, check supported link modes.\n");
                return -EINVAL; /* nothing to change due to bad input */
        }
 
+       if (proto_admin == ptys_reg.eth_proto_admin)
+               return 0; /* Nothing to change */
+
        en_dbg(DRV, priv, "mlx4_ACCESS_PTYS_REG SET: ptys_reg.eth_proto_admin = 0x%x\n",
               be32_to_cpu(proto_admin));
 
@@ -798,9 +796,9 @@ static int mlx4_en_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
                return ret;
        }
 
-       en_warn(priv, "Port link mode changed, restarting port...\n");
        mutex_lock(&priv->mdev->state_lock);
        if (priv->port_up) {
+               en_warn(priv, "Port link mode changed, restarting port...\n");
                mlx4_en_stop_port(dev, 1);
                if (mlx4_en_start_port(dev))
                        en_err(priv, "Failed restarting port %d\n", priv->port);