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Date:   Thu, 15 Oct 2020 10:48:56 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Ioana Ciornei <ioana.ciornei@....com>,
        Jose Abreu <Jose.Abreu@...opsys.com>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Andrew Lunn <andrew@...n.ch>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: linux-next: Tree for Oct 15 (drivers/net/pcs/pcs-xpcs.o)

On 10/15/20 10:02 AM, Ioana Ciornei wrote:
> On Thu, Oct 15, 2020 at 03:06:42PM +0000, Jose Abreu wrote:
>> From: Randy Dunlap <rdunlap@...radead.org>
>> Date: Oct/15/2020, 15:45:57 (UTC+00:00)
>>
>>> On 10/15/20 12:28 AM, Stephen Rothwell wrote:
>>>> Hi all,
>>>>
>>>> Since the merge window is open, please do not add any v5.11 material to
>>>> your linux-next included branches until after v5.10-rc1 has been released.
>>>>
>>>> News: there will be no linux-next releases next Monday or Tuesday.
>>>>
>>>> Changes since 20201013:
>>>>
>>>
>>> on i386:
>>>
>>> ld: drivers/net/pcs/pcs-xpcs.o: in function `xpcs_read':
>>> pcs-xpcs.c:(.text+0x29): undefined reference to `mdiobus_read'
>>> ld: drivers/net/pcs/pcs-xpcs.o: in function `xpcs_soft_reset.constprop.7':
>>> pcs-xpcs.c:(.text+0x80): undefined reference to `mdiobus_write'
>>> ld: drivers/net/pcs/pcs-xpcs.o: in function `xpcs_config_aneg':
>>> pcs-xpcs.c:(.text+0x318): undefined reference to `mdiobus_write'
>>> ld: pcs-xpcs.c:(.text+0x38e): undefined reference to `mdiobus_write'
>>> ld: pcs-xpcs.c:(.text+0x3eb): undefined reference to `mdiobus_write'
>>> ld: pcs-xpcs.c:(.text+0x437): undefined reference to `mdiobus_write'
>>> ld: drivers/net/pcs/pcs-xpcs.o:pcs-xpcs.c:(.text+0xb1e): more undefined references to `mdiobus_write' follow
>>>
>>>
> 
> I think this stems from the fact that PHYLIB is configured as a module
> which leads to MDIO_BUS being a module as well while the XPCS is still
> built-in. What should happen in this configuration is that PCS_XPCS
> should be forced to build as module. However, that select only acts in
> the opposite way so we should turn it into a depends.
> 
> Is the below patch acceptable? If it is, I can submit it properly.

Hi,
Did you copy-paste this patch?  It contains spaces instead of tabs
so it doesn't apply cleanly/easily, but I managed to apply and test it, so

Acked-by: Randy Dunlap <rdunlap@...radead.org> # build-tested

> diff --git a/drivers/net/pcs/Kconfig b/drivers/net/pcs/Kconfig
> index 074fb3f5db18..22ba7b0b476d 100644
> --- a/drivers/net/pcs/Kconfig
> +++ b/drivers/net/pcs/Kconfig
> @@ -7,8 +7,7 @@ menu "PCS device drivers"
> 
>  config PCS_XPCS
>         tristate "Synopsys DesignWare XPCS controller"
> -       select MDIO_BUS
> -       depends on MDIO_DEVICE
> +       depends on MDIO_DEVICE && MDIO_BUS
>         help
>           This module provides helper functions for Synopsys DesignWare XPCS
>           controllers.
> 
> Ioana

thanks.

-- 
~Randy

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