netdev - Re: [PATCH 0/6] ravb/sh_eth: fix sleep in atomic by reusing shared ethtool handlers

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Message-ID: <CAMuHMdWNFH2SFFmpD-eGpCSgRTyWpgM7_acTgCbxbq+KagtsOA@mail.gmail.com>
Date:   Fri, 25 May 2018 10:11:59 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Vladimir Zapolskiy <vladimir_zapolskiy@...tor.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        netdev <netdev@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>
Subject: Re: [PATCH 0/6] ravb/sh_eth: fix sleep in atomic by reusing shared
 ethtool handlers

Hi Vladimir,

On Thu, May 24, 2018 at 1:11 PM, Vladimir Zapolskiy
<vladimir_zapolskiy@...tor.com> wrote:
> For ages trivial changes to RAVB and SuperH ethernet links by means of
> standard 'ethtool' trigger a 'sleeping function called from invalid
> context' bug, to visualize it on r8a7795 ULCB:
>
>   % ethtool -r eth0
>   BUG: sleeping function called from invalid context at kernel/locking/mutex.c:747

[...]

> Please note that sh_eth patches from the series were built-tested only.

Thanks you very much!

I've tested this on both R-Car M2-W (sh_eth) and R-Car H3 ES2.0 (ravb),
and the BUG disappeared.

Tested-by: Geert Uytterhoeven <geert+renesas@...der.be>

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