linux-kernel - Re: [PATCH] spi: slave: Fix missing break in switch

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Message-ID: <CAMuHMdXyn6MYETdCAueXSKDeZXGxN2JJWX7bsE8QiUZNveeDfg@mail.gmail.com>
Date:   Wed, 3 Oct 2018 17:10:45 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     gustavo@...eddedor.com
Cc:     Mark Brown <broonie@...nel.org>,
        linux-spi <linux-spi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] spi: slave: Fix missing break in switch

Hi Gustavo,

On Wed, Oct 3, 2018 at 5:05 PM Gustavo A. R. Silva
<gustavo@...eddedor.com> wrote:
> On 10/3/18 5:01 PM, Mark Brown wrote:
> > On Wed, Oct 03, 2018 at 04:46:45PM +0200, Geert Uytterhoeven wrote:
> >> On Wed, Oct 3, 2018 at 2:57 PM Gustavo A. R. Silva
> >
> >>>         case CMD_REBOOT:
> >>>                 dev_info(&priv->spi->dev, "Rebooting system...\n");
> >>>                 kernel_restart(NULL);
> >>> +               break;
> >
> >> Alternatively, kernel_restart() and friends could be marked __noreturn.
> >
> > Yes, that seems more sensible though there's no harm in this patch even
> > with that.  It'd definitely avoid other issues in future.
>
> I'll include the __noreturn in addition to the break statement.
> I'll send v2 shortly.

Please note that adding __noreturn is not a trivial task, due to the complex
call chains, and the different implementations on the various architectures
and platforms.  So that will be a big patch series.

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