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From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Thu, 4 Jul 2019 13:49:17 +0200
Message-ID: <CAMuHMdXFkF_940-sKCZrx3KxgJU4wA-ezb_gfgHL9J-G1y4mVA@mail.gmail.com>
Subject: Re: [PATCH] iio: adc: gyroadc: fix uninitialized return code
To:     Arnd Bergmann <arnd@arndb.de>
Cc:     Marek Vasut <marek.vasut@gmail.com>,
        Jonathan Cameron <jic23@kernel.org>,
        stable <stable@vger.kernel.org>,
        Marek Vasut <marek.vasut+renesas@gmail.com>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Simon Horman <horms+renesas@verge.net.au>,
        Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
        Wolfram Sang <wsa@the-dreams.de>,
        Hartmut Knaack <knaack.h@gmx.de>,
        Lars-Peter Clausen <lars@metafoo.de>,
        Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
        Rob Herring <robh@kernel.org>,
        Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>,
        linux-iio@vger.kernel.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Hi Arnd,

On Thu, Jul 4, 2019 at 1:38 PM Arnd Bergmann <arnd@arndb.de> wrote:
> gcc-9 complains about a blatant uninitialized variable use that
> all earlier compiler versions missed:
>
> drivers/iio/adc/rcar-gyroadc.c:510:5: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]

Actually gcc-4.1 warned about that one too ;-)

So either I must have missed that warning when it appeared first,
or I must have concluded wrongly that it was a false positive.
Sorry for that...

> Return -EINVAL instead here.
>
> Cc: stable@vger.kernel.org
> Fixes: 059c53b32329 ("iio: adc: Add Renesas GyroADC driver")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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