[RFC] net: realtek: r8169: implement set_link_ksettings()

Commit 6fa1ba61520576cf1346c4ff09a056f2950cb3bf partially
implemented the new ethtool API, by replacing get_settings()
with get_link_ksettings(). This breaks ethtool, since the
userspace tool (according to the new API specs) never tries
the legacy set() call, when the new get() call succeeds.

All attempts to chance some setting from userspace result in:
> Cannot set new settings: Operation not supported

Implement the missing set() call.

Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
---
 drivers/net/ethernet/realtek/r8169.c | 40 +++++++++++++++++++++---------------
 1 file changed, 24 insertions(+), 16 deletions(-)

Any comment on this one? I have been using this in my tree since submission. No
issues to far.

I guess I could also put a Fixes-tag?

- Tobias


Tobias Jakobi wrote:
> Commit 6fa1ba61520576cf1346c4ff09a056f2950cb3bf partially
> implemented the new ethtool API, by replacing get_settings()
> with get_link_ksettings(). This breaks ethtool, since the
> userspace tool (according to the new API specs) never tries
> the legacy set() call, when the new get() call succeeds.
> 
> All attempts to chance some setting from userspace result in:
>> Cannot set new settings: Operation not supported
> 
> Implement the missing set() call.
> 
> Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
> ---
>  drivers/net/ethernet/realtek/r8169.c | 40 +++++++++++++++++++++---------------
>  1 file changed, 24 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
> index e03fcf914690..24e8f7133038 100644
> --- a/drivers/net/ethernet/realtek/r8169.c
> +++ b/drivers/net/ethernet/realtek/r8169.c
> @@ -2025,21 +2025,6 @@ static int rtl8169_set_speed(struct net_device *dev,
>  	return ret;
>  }
>  
> -static int rtl8169_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
> -{
> -	struct rtl8169_private *tp = netdev_priv(dev);
> -	int ret;
> -
> -	del_timer_sync(&tp->timer);
> -
> -	rtl_lock_work(tp);
> -	ret = rtl8169_set_speed(dev, cmd->autoneg, ethtool_cmd_speed(cmd),
> -				cmd->duplex, cmd->advertising);
> -	rtl_unlock_work(tp);
> -
> -	return ret;
> -}
> -
>  static netdev_features_t rtl8169_fix_features(struct net_device *dev,
>  	netdev_features_t features)
>  {
> @@ -2166,6 +2151,29 @@ static int rtl8169_get_link_ksettings(struct net_device *dev,
>  	return rc;
>  }
>  
> +static int rtl8169_set_link_ksettings(struct net_device *dev,
> +				      const struct ethtool_link_ksettings *cmd)
> +{
> +	struct rtl8169_private *tp = netdev_priv(dev);
> +	int rc;
> +	u32 advertising;
> +
> +	if (!ethtool_convert_link_mode_to_legacy_u32(&advertising,
> +	    cmd->link_modes.advertising))
> +		return -EINVAL;
> +
> +	del_timer_sync(&tp->timer);
> +
> +	rtl_lock_work(tp);
> +
> +	rc = rtl8169_set_speed(dev, cmd->base.autoneg, cmd->base.speed,
> +			       cmd->base.duplex, advertising);
> +
> +	rtl_unlock_work(tp);
> +
> +	return rc;
> +}
> +
>  static void rtl8169_get_regs(struct net_device *dev, struct ethtool_regs *regs,
>  			     void *p)
>  {
> @@ -2367,7 +2375,6 @@ static const struct ethtool_ops rtl8169_ethtool_ops = {
>  	.get_drvinfo		= rtl8169_get_drvinfo,
>  	.get_regs_len		= rtl8169_get_regs_len,
>  	.get_link		= ethtool_op_get_link,
> -	.set_settings		= rtl8169_set_settings,
>  	.get_msglevel		= rtl8169_get_msglevel,
>  	.set_msglevel		= rtl8169_set_msglevel,
>  	.get_regs		= rtl8169_get_regs,
> @@ -2379,6 +2386,7 @@ static const struct ethtool_ops rtl8169_ethtool_ops = {
>  	.get_ts_info		= ethtool_op_get_ts_info,
>  	.nway_reset		= rtl8169_nway_reset,
>  	.get_link_ksettings	= rtl8169_get_link_ksettings,
> +	.set_link_ksettings	= rtl8169_set_link_ksettings,
>  };
>  
>  static void rtl8169_get_mac_version(struct rtl8169_private *tp,
>