netdev - Re: [PATCH v3 3/5] net: Let the active time stamping layer be selectable.

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Message-ID: <20230310154125.696a3eb3@kmaincent-XPS-13-7390>
Date:   Fri, 10 Mar 2023 15:41:25 +0100
From:   Köry Maincent <kory.maincent@...tlin.com>
To:     Willem de Bruijn <willemdebruijn.kernel@...il.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-omap@...r.kernel.org,
        Michael Walle <michael@...le.cc>,
        Maxime Chevallier <maxime.chevallier@...tlin.com>,
        Richard Cochran <richardcochran@...il.com>,
        thomas.petazzoni@...tlin.com, Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jonathan Corbet <corbet@....net>,
        Jay Vosburgh <j.vosburgh@...il.com>,
        Veaceslav Falico <vfalico@...il.com>,
        Andy Gospodarek <andy@...yhouse.net>,
        Joakim Zhang <qiangqing.zhang@....com>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        UNGLinuxDriver@...rochip.com, Minghao Chi <chi.minghao@....com.cn>,
        Jie Wang <wangjie125@...wei.com>,
        Oleksij Rempel <linux@...pel-privat.de>,
        Sean Anderson <sean.anderson@...o.com>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Alexander Lobakin <alexandr.lobakin@...el.com>,
        Marco Bonelli <marco@...eim.net>
Subject: Re: [PATCH v3 3/5] net: Let the active time stamping layer be
 selectable.

On Wed, 08 Mar 2023 10:28:51 -0500
Willem de Bruijn <willemdebruijn.kernel@...il.com> wrote:

> >  
> > +	enum timestamping_layer selected_timestamping_layer;
> > +  
> 
> can perhaps be a single bit rather than an enum

I need at least two bits to be able to list the PTPs available.
Look at the ethtool_list_ptp function of the second patch.

> > +			err = -ENODEV;
> > +			WARN_ON(1);  
> 
> Please no WARN_ON on error cases that are known to be reachable
> and can be handled safely and reported to userspace.

Alright, thanks.

Köry