linux-kernel - Re: [net-next: PATCH 08/12] ACPI: scan: prevent double enumeration of MDIO bus children

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Date:   Mon, 20 Jun 2022 21:08:11 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Marcin Wojtas <mw@...ihalf.com>
Cc:     linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        netdev@...r.kernel.org, rafael@...nel.org,
        andriy.shevchenko@...ux.intel.com, lenb@...nel.org,
        vivien.didelot@...il.com, f.fainelli@...il.com, olteanv@...il.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, linux@...linux.org.uk, hkallweit1@...il.com,
        gjb@...ihalf.com, jaz@...ihalf.com, tn@...ihalf.com,
        Samer.El-Haj-Mahmoud@....com, upstream@...ihalf.com
Subject: Re: [net-next: PATCH 08/12] ACPI: scan: prevent double enumeration
 of MDIO bus children

On Mon, Jun 20, 2022 at 05:02:21PM +0200, Marcin Wojtas wrote:
> The MDIO bus is responsible for probing and registering its respective
> children, such as PHYs or other kind of devices.
> 
> It is required that ACPI scan code should not enumerate such
> devices, leaving this task for the generic MDIO bus routines,
> which are initiated by the controller driver.

I suppose the question is, should you ignore the ACPI way of doing
things, or embrace the ACPI way?

At least please add a comment why the ACPI way is wrong, despite this
being an ACPI binding.

      Andrew