netdev - Re: [RFC PATCH net-next 1/3] net: phy: don't bind genphy in phy_attach_direct if the specific driver defers probe

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Message-ID: <YTCpbkDMUfBtJM1V@kroah.com>
Date:   Thu, 2 Sep 2021 12:37:34 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Vladimir Oltean <vladimir.oltean@....com>, netdev@...r.kernel.org,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        linux-kernel@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Alvin Šipraga <alsi@...g-olufsen.dk>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        kernel-team <kernel-team@...roid.com>,
        Len Brown <lenb@...nel.org>
Subject: Re: [RFC PATCH net-next 1/3] net: phy: don't bind genphy in
 phy_attach_direct if the specific driver defers probe

On Thu, Sep 02, 2021 at 01:11:50PM +0300, Vladimir Oltean wrote:
> On Thu, Sep 02, 2021 at 07:43:10AM +0200, Greg Kroah-Hartman wrote:
> > Wait, no, this should not be a "special" thing, and why would the list
> > of deferred probe show this?
> 
> Why as in why would it work/do what I want, or as in why would you want to do that?

Both!  :)

> > If a bus wants to have this type of "generic vs. specific" logic, then
> > it needs to handle it in the bus logic itself as that does NOT fit into
> > the normal driver model at all.  Don't try to get a "hint" of this by
> > messing with the probe function list.
> 
> Where and how? Do you have an example?

No I do not, sorry, most busses do not do this for obvious ordering /
loading / we are not that crazy reasons.

What is causing this all to suddenly break?  The devlink stuff?

thanks,

greg k-h