netdev - Re: ethtool 5.7: netlink ENOENT error when setting WOL

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Date:   Wed, 10 Jun 2020 13:53:50 +0200
From:   Michal Kubecek <mkubecek@...e.cz>
To:     Heiner Kallweit <hkallweit1@...il.com>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: ethtool 5.7: netlink ENOENT error when setting WOL

On Wed, Jun 10, 2020 at 12:50:30PM +0200, Heiner Kallweit wrote:
> On 10.06.2020 11:13, Michal Kubecek wrote:
> > Just to make sure you are hitting the same problem I'm just looking at,
> > please check if
> > 
> > - your kernel is built with ETHTOOL_NETLINK=n
> 
> No, because I have PHYLIB=m.
> Not sure what it would take to allow building ethtool netlink support
> as a module. But that's just on a side note.

Yes, this is the unfortunate fallout of the new dependency between
ETHTOOL_NETLINK and PHYLIB introduced with the cable diagnostic series.
As "make oldconfig" silently disables ETHTOOL_NETLINK when PHYLIB=m,
many people won't even notice. Even I fell for this when I suddently
noticed my testing merge window snapshot has ETHTOOL_NETLINK disable.
I guess we will have to find some nicer solution.

Michal