linux-kernel - Re: [PATCH net-next v3 02/11] net: phy: introduce phy_has_c45

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Message-ID: <ZMqOA+NblHun1hbo@shell.armlinux.org.uk>
Date:   Wed, 2 Aug 2023 18:10:27 +0100
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Michael Walle <mwalle@...nel.org>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Yisen Zhuang <yisen.zhuang@...wei.com>,
        Salil Mehta <salil.mehta@...wei.com>,
        Florian Fainelli <florian.fainelli@...adcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Marek Behún <kabel@...nel.org>,
        Xu Liang <lxu@...linear.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Simon Horman <simon.horman@...igine.com>
Subject: Re: [PATCH net-next v3 02/11] net: phy: introduce
 phy_has_c45_registers()

On Wed, Aug 02, 2023 at 06:15:19PM +0200, Andrew Lunn wrote:
> > I'm confused now. Andrew suggested to split it into four different
> > functions:
> > 
> > phy_has_c22_registers()
> > phy_has_c45_registers()
> > phy_has_c22_transfers()
> > phy_has_c45_transfers()
> > 
> > Without a functional change. That is, either return phydev->is_c45
> > or the inverse.
> 
> Without a functional change at this step of introducing the four
> functions. Then later really implement them to do what the name
> implies. Doing it in steps helps with bisect when it breaks something.
> 
> It could also be that not all four are needed, or not all four are
> possible. But the four express the full combinations of transfers and
> registers.

I'm left wondering how you think that phy_has_c45_registers() can
be implemented in a useful way, because I'm at a total loss...

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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