linux-kernel - Re: [PATCH] net/sun3_82586: Kill array subscript above array bounds warning

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Message-ID: <CAMuHMdWeKuFVd-8_XRzWmJNp11cHP6wRj7K96v=D9We2=XyAgw@mail.gmail.com>
Date:	Thu, 18 Jul 2013 09:04:36 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	David Miller <davem@...emloft.net>
Cc:	Sam Creasey <sammy@...my.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"Linux/m68k" <linux-m68k@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net/sun3_82586: Kill array subscript above array bounds warning

On Thu, Jul 18, 2013 at 3:22 AM, David Miller <davem@...emloft.net> wrote:
>> drivers/net/ethernet/i825xx/sun3_82586.c: In function 'sun3_82586_timeout':
>> drivers/net/ethernet/i825xx/sun3_82586.c:993:89: warning: array subscript is above array bounds [-Warray-bounds]
>>
>> Using the default NUM_XMIT_BUFFS = 1, there's only one transmit buffer.
>> Hence accessing the second buffer is an out-of-bounds access.
>> Print the command status of the first NOP buffer instead.
>>
>> Fortunately this actually worked fine, as the layout of transmit and NOP
>> buffers is sufficiently similar.
>>
>> Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
>
> Three more CPP directives in a DEBUG ifdef'd piece of code, yuck.
>
> I'd say just kill this whole DEBUG section entirely.  If people
> want this driver to print this debugging, do it properly with
> netif_err() or similar.

Yeah, this driver could use some major cleanup. I had to protect my eyes while
fixing the compiler warning.

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
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