linux-kernel - Re: [PATCH] scsi: sun3_scsi: Mark expected switch fall-throughs

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Message-ID: <CAMuHMdXEU4eUEdNyY=K2B_Tj=unJV2eSJo1BQ8vDwZ-D-2wDWg@mail.gmail.com>
Date:   Mon, 29 Jul 2019 17:39:49 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Cc:     Finn Thain <fthain@...egraphics.com.au>,
        Michael Schmitz <schmitzmic@...il.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        scsi <linux-scsi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH] scsi: sun3_scsi: Mark expected switch fall-throughs

Hi Gustavo,

On Mon, Jul 29, 2019 at 4:32 PM Gustavo A. R. Silva
<gustavo@...eddedor.com> wrote:
> Mark switch cases where we are expecting to fall through.
>
> This patch fixes the following warnings:
>
> drivers/scsi/sun3_scsi.c: warning: this statement may fall through
> [-Wimplicit-fallthrough=]:  => 399:9, 403:9
>
> Reported-by: Geert Uytterhoeven <geert@...ux-m68k.org>
> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>

Thanks!
Tested-by: Geert Uytterhoeven <geert@...ux-m68k.org>

> --- a/drivers/scsi/sun3_scsi.c
> +++ b/drivers/scsi/sun3_scsi.c
> @@ -397,10 +397,12 @@ static int sun3scsi_dma_finish(int write_flag)
>                 case CSR_LEFT_3:
>                         *vaddr = (dregs->bpack_lo & 0xff00) >> 8;
>                         vaddr--;
> +                       /* Fall through */
>
>                 case CSR_LEFT_2:
>                         *vaddr = (dregs->bpack_hi & 0x00ff);
>                         vaddr--;
> +                       /* Fall through */
>

I think it would be clearer if you would drop the blank lines.

>                 case CSR_LEFT_1:
>                         *vaddr = (dregs->bpack_hi & 0xff00) >> 8;

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