netdev - Re: [PATCH net-next] net: ks8851: Connect and start/stop the internal PHY

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Message-ID: <YABNA+0aPI42lJLh@lunn.ch>
Date:   Thu, 14 Jan 2021 14:54:11 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Marek Vasut <marex@...x.de>
Cc:     netdev@...r.kernel.org, Heiner Kallweit <hkallweit1@...il.com>,
        Lukas Wunner <lukas@...ner.de>
Subject: Re: [PATCH net-next] net: ks8851: Connect and start/stop the
 internal PHY

On Tue, Jan 12, 2021 at 11:28:00PM +0100, Marek Vasut wrote:
> On 1/11/21 3:47 PM, Andrew Lunn wrote:
> > On Mon, Jan 11, 2021 at 01:53:37PM +0100, Marek Vasut wrote:
> > > Unless the internal PHY is connected and started, the phylib will not
> > > poll the PHY for state and produce state updates. Connect the PHY and
> > > start/stop it.
> > 
> > Hi Marek
> > 
> > Please continue the conversion and remove all mii_calls.
> > 
> > ks8851_set_link_ksettings() calling mii_ethtool_set_link_ksettings()
> > is not good, phylib will not know about changes which we made to the
> > PHY etc.
> 
> Hi,
> 
> I noticed a couple of drivers implement both the mii and mdiobus options.

Which ones?

Simply getting the link status might be safe, but if
set_link_ksettings() or get_link_ksettings() is used, phylib is going
to get confused when the PHY is changed without it knowing.. So please
do remove all the mii calls as part of the patchset.

	Andrew