linux-kernel - Re: [net-next: PATCH v3 4/6] net: mvmdio: add ACPI support

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Message-ID: <YNPe0JyCuHxOQBPZ@lunn.ch>
Date:   Thu, 24 Jun 2021 03:24:32 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Marcin Wojtas <mw@...ihalf.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        Grzegorz Jaszczyk <jaz@...ihalf.com>,
        Grzegorz Bernacki <gjb@...ihalf.com>, upstream@...ihalf.com,
        Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud@....com>,
        Jon Nettleton <jon@...id-run.com>,
        Tomasz Nowicki <tn@...ihalf.com>, rjw@...ysocki.net,
        lenb@...nel.org
Subject: Re: [net-next: PATCH v3 4/6] net: mvmdio: add ACPI support

On Wed, Jun 23, 2021 at 11:58:14PM +0200, Marcin Wojtas wrote:
> śr., 23 cze 2021 o 22:28 Andrew Lunn <andrew@...n.ch> napisał(a):
> >
> > On Mon, Jun 21, 2021 at 07:30:26PM +0200, Marcin Wojtas wrote:
> > > This patch introducing ACPI support for the mvmdio driver by adding
> > > acpi_match_table with two entries:
> > >
> > > * "MRVL0100" for the SMI operation
> > > * "MRVL0101" for the XSMI mode
> >
> > Same as the freescale MDIO bus driver, you should add
> >
> > depends on FWNODE_MDIO
> >
> > Otherwise you might find randconfig builds end up with it disabled,
> > and then linker errors.
> >
> 
> The CONFIG_MVMDIO is selected by CONFIG_MV643XX_ETH and actually there
> is a real example of the previously discussed fallback to the
> mdiobus_register() (without DT/ACPI and now FWNODE_MDIO). I just
> checked and successfully built the kernel out of the dove_defconfig. I
> only needed below fix, that will be submitted in v4:

You could be correct, but i've seen randconfig builds find issues. So
i tend to add dependencies to avoid possible problems.  Such problem
reports tend to come weeks later, when Arnd does such builds.

	Andrew