linux-kernel - Re: [PATCH] pinctrl: amd: avoid maybe-uninitalized warning

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Message-ID: <CACRpkdZrhrMi4SGa8RCwTzcLQDumEQjpw+LftLNEaxxRAZu8Vw@mail.gmail.com>
Date:   Thu, 12 Jan 2017 08:49:52 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     "Agrawal, Nitesh-kumar" <Nitesh-kumar.Agrawal@....com>,
        Pankaj Sen <Pankaj.Sen@....com>,
        "Shah, Nehal-bakulchandra" <Nehal-Bakulchandra.shah@....com>,
        Shyam-sundar S-k <Shyam-sundar.S-k@....com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] pinctrl: amd: avoid maybe-uninitalized warning

On Wed, Jan 11, 2017 at 3:36 PM, Arnd Bergmann <arnd@...db.de> wrote:

> Since gpio_dev->hwbank_num is now a variable, the compiler cannot
> figure out if pin_num is initialized at all:
>
> drivers/pinctrl/pinctrl-amd.c: In function 'amd_gpio_dbg_show':
> drivers/pinctrl/pinctrl-amd.c:210:3: warning: 'pin_num' may be used uninitialized in this function [-Wmaybe-uninitialized]
>    for (; i < pin_num; i++) {
>    ^~~
> drivers/pinctrl/pinctrl-amd.c:172:21: warning: 'i' may be used uninitialized in this function [-Wmaybe-uninitialized]
>
> This adds a 'default' statement to make that case well-defined.
>
> Fixes: 3bfd44306c65 ("pinctrl: amd: Add support for additional GPIO")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Patch applied.

Yours,
Linus Walleij