Re: [PATCH 2/3] net: mana: Implement set_link_ksettings in ethtool for speed

[Andrew Lunn]

On Thu, Mar 20, 2025 at 05:22:20AM -0700, Erni Sri Satya Vennela wrote:
> Add support for ethtool_set_link_ksettings for mana.
> Set speed information of the port using ethtool. This
> feature is not supported by all hardware.
> 
> Before the change:
> $ethtool -s enP30832s1 speed 100
> >netlink error: Operation not supported
> $ethtool enP30832s1
> >Settings for enP30832s1:
>         Supported ports: [  ]
>         Supported link modes:   Not reported

Since there are no link modes, what does this speed actually mean?

> After the change:
> $ethtool -s enP30832s1 speed 100

Is 

$ethtool -s enP30832s1 speed 42

permitted? 

or

$ethtool -s enP30832s1 speed -1

	Andrew