netdev - Re: [PATCH net-next v3] ethernet: fix PTP_1588

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Date:   Wed, 4 Aug 2021 17:21:05 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Richard Cochran <richardcochran@...il.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jacob Keller <jacob.e.keller@...el.com>,
        Arnd Bergmann <arnd@...db.de>, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        Yisen Zhuang <yisen.zhuang@...wei.com>,
        Salil Mehta <salil.mehta@...wei.com>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        Tariq Toukan <tariqt@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        Jiri Pirko <jiri@...dia.com>, Ido Schimmel <idosch@...dia.com>,
        Shannon Nelson <snelson@...sando.io>, drivers@...sando.io,
        Sergei Shtylyov <sergei.shtylyov@...il.com>,
        Edward Cree <ecree.xilinx@...il.com>,
        Martin Habets <habetsm.xilinx@...il.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Yangbo Lu <yangbo.lu@....com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Simon Horman <simon.horman@...ronome.com>,
        Networking <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Intel Wired LAN <intel-wired-lan@...ts.osuosl.org>
Subject: Re: [PATCH net-next v3] ethernet: fix PTP_1588_CLOCK dependencies

On Wed, Aug 4, 2021 at 4:28 PM Richard Cochran <richardcochran@...il.com> wrote:
> > @@ -87,8 +87,8 @@ config E1000E_HWTS
> >  config IGB
> >       tristate "Intel(R) 82575/82576 PCI-Express Gigabit Ethernet support"
> >       depends on PCI
> > -     imply PTP_1588_CLOCK
> > -     select I2C
> > +     depends on PTP_1588_CLOCK_OPTIONAL
> > +     depends on I2C
>
> This little i2c bit sneaks in, but I guess you considered any possible
> trouble with it?

Good catch!

I did need this with v2, as it was causing a circular dependency against
(IIRC) CONFIG_MLXSW_I2C, but I'm fairly sure it's not needed any
more after everything else uses 'depends on' now.

I'm happy to resend a v4 without that change, as it doesn't belong in here,
or we just leave it because it is correct after all, depending on what the Intel
ethernet people prefer.

> Acked-by: Richard Cochran <richardcochran@...il.com>

Thanks,

      Arnd