netdev - Re: [PATCH net-next] net: atm: remove the ambassador driver

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Message-ID: <CAK8P3a28s+NkN2XLghBgXA5i_g56z0yK0H3CVMZkLpamyZt2qw@mail.gmail.com>
Date:   Wed, 6 Apr 2022 09:50:41 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     David Miller <davem@...emloft.net>, pabeni@...hat.com,
        Networking <netdev@...r.kernel.org>, myxie@...ian.org,
        Jesper Juhl <jj@...osbits.net>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Chas Williams <3chas3@...il.com>,
        linux-atm-general@...ts.sourceforge.net,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        "open list:BROADCOM NVRAM DRIVER" <linux-mips@...r.kernel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>
Subject: Re: [PATCH net-next] net: atm: remove the ambassador driver

On Wed, Apr 6, 2022 at 6:16 AM Jakub Kicinski <kuba@...nel.org> wrote:
>
> The driver for ATM Ambassador devices spews build warnings on
> microblaze. The virt_to_bus() calls discard the volatile keyword.
> The right thing to do would be to migrate this driver to a modern
> DMA API but it seems unlikely anyone is actually using it.
> There had been no fixes or functional changes here since
> the git era begun.
>
> In fact it sounds like the FW loading was broken from 2008
> 'til 2012 - see commit fcdc90b025e6 ("atm: forever loop loading
> ambassador firmware").
>
> Let's remove this driver, there isn't much changing in the APIs,
> if users come forward we can apologize and revert.
>
> Link: https://lore.kernel.org/all/20220321144013.440d7fc0@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com/
> Signed-off-by: Jakub Kicinski <kuba@...nel.org>
> ---
> CC: myxie@...ian.org,gprocida@...ge.com
> CC: Jesper Juhl <jj@...osbits.net>
> CC: Dan Carpenter <dan.carpenter@...cle.com>
> CC: Chas Williams <3chas3@...il.com> # ATM
> CC: linux-atm-general@...ts.sourceforge.net
> CC: tsbogend@...ha.franken.de # MIPS
> CC: linux-mips@...r.kernel.org
> CC: p.zabel@...gutronix.de # dunno why, get_maintainer
> ---
>  arch/mips/configs/gpr_defconfig  |    1 -
>  arch/mips/configs/mtx1_defconfig |    1 -
>  drivers/atm/Kconfig              |   25 -
>  drivers/atm/Makefile             |    1 -
>  drivers/atm/ambassador.c         | 2400 ------------------------------
>  drivers/atm/ambassador.h         |  648 --------

Acked-by: Arnd Bergmann <arnd@...db.de>