linux-kernel - Re: [PATCH v2 03/18] iio: adc: envelope-detector: Simplify with dev_err

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Date:   Thu, 27 Aug 2020 22:46:14 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.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>,
        linux-iio <linux-iio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm Mailing List <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 v2 03/18] iio: adc: envelope-detector: Simplify with dev_err_probe()

On Thu, Aug 27, 2020 at 10:27 PM Krzysztof Kozlowski <krzk@...nel.org> wrote:
>
> Common pattern of handling deferred probe can be simplified with
> dev_err_probe().  Less code and also it prints the error value.

Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>

> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
>
> ---
>
> Changes since v1:
> 1. Wrap dev_err_probe() lines at 100 character
> ---
>  drivers/iio/adc/envelope-detector.c | 15 +++++----------
>  1 file changed, 5 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/iio/adc/envelope-detector.c b/drivers/iio/adc/envelope-detector.c
> index 2a4fd3bb64cf..91a7be4a3f1b 100644
> --- a/drivers/iio/adc/envelope-detector.c
> +++ b/drivers/iio/adc/envelope-detector.c
> @@ -348,11 +348,8 @@ static int envelope_detector_probe(struct platform_device *pdev)
>         indio_dev->num_channels = 1;
>
>         env->dac = devm_iio_channel_get(dev, "dac");
> -       if (IS_ERR(env->dac)) {
> -               if (PTR_ERR(env->dac) != -EPROBE_DEFER)
> -                       dev_err(dev, "failed to get dac input channel\n");
> -               return PTR_ERR(env->dac);
> -       }
> +       if (IS_ERR(env->dac))
> +               return dev_err_probe(dev, PTR_ERR(env->dac), "failed to get dac input channel\n");
>
>         env->comp_irq = platform_get_irq_byname(pdev, "comp");
>         if (env->comp_irq < 0)
> @@ -360,11 +357,9 @@ static int envelope_detector_probe(struct platform_device *pdev)
>
>         ret = devm_request_irq(dev, env->comp_irq, envelope_detector_comp_isr,
>                                0, "envelope-detector", env);
> -       if (ret) {
> -               if (ret != -EPROBE_DEFER)
> -                       dev_err(dev, "failed to request interrupt\n");
> -               return ret;
> -       }
> +       if (ret)
> +               return dev_err_probe(dev, ret, "failed to request interrupt\n");
> +
>         env->comp_irq_trigger = irq_get_trigger_type(env->comp_irq);
>         if (env->comp_irq_trigger & IRQF_TRIGGER_RISING)
>                 env->comp_irq_trigger_inv |= IRQF_TRIGGER_FALLING;
> --
> 2.17.1
>


-- 
With Best Regards,
Andy Shevchenko