linux-kernel - Re: [PATCH v2] net: phy: Prevent reporting advertised modes when autoneg is off

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Message-ID: <20201016180935.GG139700@lunn.ch>
Date:   Fri, 16 Oct 2020 20:09:35 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Łukasz Stelmach <l.stelmach@...sung.com>
Cc:     Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Bartłomiej Żolnierkiewicz 
        <b.zolnierkie@...sung.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH v2] net: phy: Prevent reporting advertised modes when
 autoneg is off

On Thu, Oct 15, 2020 at 10:44:35AM +0200, Łukasz Stelmach wrote:
> Do not report advertised link modes (local and remote) when
> autonegotiation is turned off. mii_ethtool_get_link_ksettings() exhibits
> the same behaviour and this patch aims at unifying the behavior of both
> functions.

Does ethtool allow you to configure advertised modes with autoneg off?
If it can, it would be useful to see what is being configured, before
it is actually turned on.

ethtool -s eth42 autoneg off advertise 0xf

does not give an error on an interface i have.

     Andrew