linux-kernel - Re: [PATCH v2 06/21] pinctrl: equilibrium: Convert to use struct pingroup

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Message-ID: <ZWCzl-EYXdymay4p@smile.fi.intel.com>
Date:   Fri, 24 Nov 2023 16:30:47 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     kernel test robot <lkp@...el.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Jonathan Neuschäfer <j.neuschaefer@....net>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Biju Das <biju.das.jz@...renesas.com>,
        Claudiu Beznea <claudiu.beznea.uj@...renesas.com>,
        Jianlong Huang <jianlong.huang@...rfivetech.com>,
        linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        openbmc@...ts.ozlabs.org, linux-mips@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        oe-kbuild-all@...ts.linux.dev, Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Dong Aisheng <aisheng.dong@....com>,
        Fabio Estevam <festevam@...il.com>,
        Shawn Guo <shawnguo@...nel.org>, Jacky Bai <ping.bai@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>,
        Sean Wang <sean.wang@...nel.org>
Subject: Re: [PATCH v2 06/21] pinctrl: equilibrium: Convert to use struct
 pingroup

On Fri, Nov 24, 2023 at 09:19:45PM +0800, kernel test robot wrote:

...

> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202311241401.ZPILPdov-lkp@intel.com/
> 
> smatch warnings:
> drivers/pinctrl/pinctrl-equilibrium.c:719 eqbr_build_groups() warn: unsigned 'grp->npins' is never less than zero.

Thank you for the report!

...

>    718			grp->npins = of_property_count_u32_elems(np, "pins");
>  > 719			if (grp->npins < 0) {
>    720				dev_err(dev, "No pins in the group: %s\n", prop->name);
>    721				of_node_put(np);
>    722				return -EINVAL;
>    723			}

Surprisingly (to me) the _count_u32_elems() can return a negative error code...
Fine, I redo a bit the code by introducing a new patch that will use err instead
of ->npins (which sounds better approach anyway).

-- 
With Best Regards,
Andy Shevchenko