linux-kernel - Re: [PATCH 11/16] iio: chemical: scd30: Simplify with dev_err

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20200826153434.GA7468@arch>
Date:   Wed, 26 Aug 2020 17:34:34 +0200
From:   Tomasz Duszynski <tomasz.duszynski@...akon.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
CC:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Peter Rosin <peda@...ntia.se>, Kukjin Kim <kgene@...nel.org>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Kevin Hilman <khilman@...libre.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Beniamin Bia <beniamin.bia@...log.com>,
        Tomasz Duszynski <tomasz.duszynski@...akon.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Jonathan Bakker <xc-racer2@...e.ca>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-samsung-soc@...r.kernel.org>,
        <linux-amlogic@...ts.infradead.org>,
        <linux-stm32@...md-mailman.stormreply.com>
Subject: Re: [PATCH 11/16] iio: chemical: scd30: Simplify with dev_err_probe()

On Wed, Aug 26, 2020 at 04:51:48PM +0200, Krzysztof Kozlowski wrote:
> Common pattern of handling deferred probe can be simplified with
> dev_err_probe().  Less code and also it prints the error value.
>
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
> ---
>  drivers/iio/chemical/scd30_core.c | 10 +++-------
>  1 file changed, 3 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/iio/chemical/scd30_core.c b/drivers/iio/chemical/scd30_core.c
> index eac76972f83e..92358797796d 100644
> --- a/drivers/iio/chemical/scd30_core.c
> +++ b/drivers/iio/chemical/scd30_core.c
> @@ -705,13 +705,9 @@ int scd30_probe(struct device *dev, int irq, const char *name, void *priv,
>  	indio_dev->available_scan_masks = scd30_scan_masks;
>
>  	state->vdd = devm_regulator_get(dev, "vdd");
> -	if (IS_ERR(state->vdd)) {
> -		if (PTR_ERR(state->vdd) == -EPROBE_DEFER)
> -			return -EPROBE_DEFER;
> -
> -		dev_err(dev, "failed to get regulator\n");
> -		return PTR_ERR(state->vdd);
> -	}
> +	if (IS_ERR(state->vdd))
> +		return dev_err_probe(dev, PTR_ERR(state->vdd),
> +				     "failed to get regulator\n");

I'd say that removing like break would slightly improve readability.
Besides, staying within 100 columns seems socially acceptable now.
Otherwise,

Acked-by: Tomasz Duszynski <tomasz.duszynski@...akon.com>

>
>  	ret = regulator_enable(state->vdd);
>  	if (ret)
> --
> 2.17.1
>