netdev - Re: [PATCH net] Revert "ravb: Fixed to be able to unload modules"

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Message-ID: <CAMuHMdU+2KXZ86f_PK8v2Kr08XsECp-YH586aW5WCDpkq07K-g@mail.gmail.com>
Date:   Thu, 24 Sep 2020 09:14:27 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     David Miller <davem@...emloft.net>
Cc:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Jakub Kicinski <kuba@...nel.org>,
        Yusuke Ashiduka <ashiduka@...itsu.com>,
        Sergei Shtylyov <sergei.shtylyov@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        netdev <netdev@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        stable <stable@...r.kernel.org>
Subject: Re: [PATCH net] Revert "ravb: Fixed to be able to unload modules"

Hi David,

On Thu, Sep 24, 2020 at 2:40 AM David Miller <davem@...emloft.net> wrote:
> From: Geert Uytterhoeven <geert+renesas@...der.be>
> Date: Tue, 22 Sep 2020 09:29:31 +0200
>
> > This reverts commit 1838d6c62f57836639bd3d83e7855e0ee4f6defc.
> >
> > This commit moved the ravb_mdio_init() call (and thus the
> > of_mdiobus_register() call) from the ravb_probe() to the ravb_open()
> > call.  This causes a regression during system resume (s2idle/s2ram), as
> > new PHY devices cannot be bound while suspended.
>  ...
> >
> > Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> > Cc: stable@...r.kernel.org
>
> I noticed this too late, but please don't CC: stable on networking
> patches.  We have our own workflow as per the netdev FAQ.

OK, will try to remember.
I wanted to give a heads-up to stable that they've backported early a
patch which turned out to have issues.

> I've applied this but the inability to remove a module is an
> extremely serious bug and should be fixed properly.

Sure. As you stated in
https://lore.kernel.org/linux-renesas-soc/20200820.165244.540878641387937530.davem@davemloft.net/
that will need some rework in the MDIO subsystem...

Thanks!

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds