netdev - Re: [PATCH ethtool v2 2/5] netlink: settings: Add netlink support for lanes parameter

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Date:   Tue, 9 Feb 2021 20:42:29 +0100
From:   Michal Kubecek <mkubecek@...e.cz>
To:     Danielle Ratson <danieller@...dia.com>
Cc:     netdev@...r.kernel.org, f.fainelli@...il.com, kuba@...nel.org,
        andrew@...n.ch, mlxsw@...dia.com
Subject: Re: [PATCH ethtool v2 2/5] netlink: settings: Add netlink support
 for lanes parameter

On Tue, Feb 02, 2021 at 08:25:10PM +0200, Danielle Ratson wrote:
> Add support for "ethtool -s <dev> lanes N ..." for setting a specific
> number of lanes.
> 
> Signed-off-by: Danielle Ratson <danieller@...dia.com>
> Reviewed-by: Jiri Pirko <jiri@...dia.com>
> ---
>  ethtool.c          | 1 +
>  netlink/settings.c | 8 ++++++++
>  2 files changed, 9 insertions(+)
> 
> diff --git a/ethtool.c b/ethtool.c
> index 585aafa..fcb09f7 100644
> --- a/ethtool.c
> +++ b/ethtool.c
> @@ -5620,6 +5620,7 @@ static const struct option args[] = {
>  		.nlfunc	= nl_sset,
>  		.help	= "Change generic options",
>  		.xhelp	= "		[ speed %d ]\n"
> +			  "		[ lanes %d ]\n"
>  			  "		[ duplex half|full ]\n"
>  			  "		[ port tp|aui|bnc|mii|fibre|da ]\n"
>  			  "		[ mdix auto|on|off ]\n"
> diff --git a/netlink/settings.c b/netlink/settings.c
> index 90c28b1..6cb5d5b 100644
> --- a/netlink/settings.c
> +++ b/netlink/settings.c
> @@ -20,6 +20,7 @@
>  struct link_mode_info {
>  	enum link_mode_class	class;
>  	u32			speed;
> +	u32			lanes;
>  	u8			duplex;
>  };
>  

This structure member is not used anywhere in this patch and, AFAICS,
not even in the rest of your series. Perhaps a leftover from an older
version?

Michal

> @@ -1067,6 +1068,13 @@ static const struct param_parser sset_params[] = {
>  		.handler	= nl_parse_direct_u32,
>  		.min_argc	= 1,
>  	},
> +	{
> +		.arg		= "lanes",
> +		.group		= ETHTOOL_MSG_LINKMODES_SET,
> +		.type		= ETHTOOL_A_LINKMODES_LANES,
> +		.handler	= nl_parse_direct_u32,
> +		.min_argc	= 1,
> +	},
>  	{
>  		.arg		= "duplex",
>  		.group		= ETHTOOL_MSG_LINKMODES_SET,
> -- 
> 2.26.2
> 

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