linux-kernel - Re: [PATCH] pinctrl: sx150x: handle failure case of devm

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Message-ID: <CACRpkdYB9i5fy9KyBBsqoh4Mh6RgtOx15mTHd_cmT=nHS=f0Dw@mail.gmail.com>
Date:   Fri, 7 Dec 2018 13:23:28 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Nicholas Mc Guire <hofrat@...dl.org>
Cc:     "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] pinctrl: sx150x: handle failure case of devm_kstrdup

On Sun, Dec 2, 2018 at 11:08 AM Nicholas Mc Guire <hofrat@...dl.org> wrote:

> devm_kstrdup() may return NULL if internal allocation failed.
> Thus using  label, name  is unsafe without checking. Therefor
> in the unlikely case of allocation failure, sx150x_probe() simply
> returns -ENOMEM.
>
> Signed-off-by: Nicholas Mc Guire <hofrat@...dl.org>
> Fixes: 9e80f9064e73 ("pinctrl: Add SX150X GPIO Extender Pinctrl Driver")

Patch applied.

> Problem located with an experimental coccinelle script

I like this script.

Yours,
Linus Walleij