netdev - Re: [PATCH net-next] ethtool: reset #lanes when lanes is omitted

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Date:   Thu, 30 Mar 2023 10:38:56 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Andy Roulin <aroulin@...dia.com>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, jiri@...dia.com,
        andrew@...n.ch, f.fainelli@...il.com, mkubecek@...e.cz,
        mlxsw@...dia.com, idosch@...dia.com,
        Danielle Ratson <danieller@...dia.com>
Subject: Re: [PATCH net-next] ethtool: reset #lanes when lanes is omitted

On Thu, 30 Mar 2023 09:56:58 -0700 Andy Roulin wrote:
> Subject: [PATCH net-next] ethtool: reset #lanes when lanes is omitted

This should have been tagged for net, right?

> If the number of lanes was forced and then subsequently the user
> omits this parameter, the ksettings->lanes is reset. The driver
> should then reset the number of lanes to the device's default
> for the specified speed.
> 
> However, although the ksettings->lanes is set to 0, the mod variable
> is not set to true to indicate the driver and userspace should be
> notified of the changes.
> 
> Fixes: 012ce4dd3102 ("ethtool: Extend link modes settings uAPI with lanes")
> Signed-off-by: Andy Roulin <aroulin@...dia.com>
> Reviewed-by: Danielle Ratson <danieller@...dia.com>