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From:   Marcin Wojtas <mw@semihalf.com>
Date:   Thu, 28 Jul 2022 18:56:48 +0200
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Subject: Re: [net-next: PATCH v3 6/8] net: core: switch to fwnode_find_net_device_by_node()
To:     Vladimir Oltean <olteanv@gmail.com>
Cc:     Andy Shevchenko <andy.shevchenko@gmail.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
        netdev <netdev@vger.kernel.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Sean Wang <sean.wang@mediatek.com>,
        Landen Chao <Landen.Chao@mediatek.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        Andrew Lunn <andrew@lunn.ch>,
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czw., 28 lip 2022 o 11:16 Vladimir Oltean <olteanv@gmail.com> napisa=C5=82(=
a):
>
> On Thu, Jul 28, 2022 at 08:52:04AM +0200, Marcin Wojtas wrote:
> > Yes, indeed. After recent update, I think we can assume the current
> > implementation of fwnode_find_parent_dev_match should work fine with
> > all existing cases.
>
> What you should really be fixing is the commit message of patch 4,
> that's what threw me off:
>
> | As a preparation to switch the DSA subsystem from using
> | of_find_net_device_by_node() to its more generic fwnode_
> | equivalent, the port's device structure should be updated
> | with its fwnode pointer, similarly to of_node - see analogous
> | commit c4053ef32208 ("net: mvpp2: initialize port of_node pointer").
> |
> | This patch is required to prevent a regression before updating
> | the DSA API on boards that connect the mvpp2 port to switch,
> | such as Clearfog GT-8K or CN913x CEx7 Evaluation Board.
>
> There's no regression to speak of. DSA didn't work with ACPI before, and
> fwnode_find_net_device_by_node() still works with the plain dev->of_node
> assignment.

There was a regression even for OF in v1, but after switching to
device_match_fwnode() it works indeed. Anyway patch v4 is imo useful,
I'll only reword the commit message.

Thanks,
Marcin