linux-kernel - Re: [PATCH 4/4] iio: adc: ad7476: implement devm_add_action_or

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Message-ID: <20200315131806.61e1d3f8@archlinux>
Date:   Sun, 15 Mar 2020 13:18:06 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Beniamin Bia <beniamin.bia@...log.com>
Cc:     <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <knaack.h@....de>, <pmeerw@...erw.net>,
        <Michael.Hennerich@...log.com>, <biabeniamin@...look.com>
Subject: Re: [PATCH 4/4] iio: adc: ad7476: implement
 devm_add_action_or_reset

On Wed, 11 Mar 2020 10:43:28 +0200
Beniamin Bia <beniamin.bia@...log.com> wrote:

> Use devm_add_action_or_reset to automatically disable the device
> when it is removed or an error occurs during probe routine.
> 
> Signed-off-by: Beniamin Bia <beniamin.bia@...log.com>
Applied,

Thanks,

Jonathan
> ---
>  drivers/iio/adc/ad7476.c | 25 ++++++++++++-------------
>  1 file changed, 12 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/iio/adc/ad7476.c b/drivers/iio/adc/ad7476.c
> index cd7d42df2033..e9984a38fc4c 100644
> --- a/drivers/iio/adc/ad7476.c
> +++ b/drivers/iio/adc/ad7476.c
> @@ -256,6 +256,13 @@ static const struct iio_info ad7476_info = {
>  	.read_raw = &ad7476_read_raw,
>  };
>  
> +static void ad7476_reg_disable(void *data)
> +{
> +	struct ad7476_state *st = data;
> +
> +	regulator_disable(st->reg);
> +}
> +
>  static int ad7476_probe(struct spi_device *spi)
>  {
>  	struct ad7476_state *st;
> @@ -278,6 +285,11 @@ static int ad7476_probe(struct spi_device *spi)
>  	if (ret)
>  		return ret;
>  
> +	ret = devm_add_action_or_reset(&spi->dev, ad7476_reg_disable,
> +				       st);
> +	if (ret)
> +		return ret;
> +
>  	st->convst_gpio = devm_gpiod_get_optional(&spi->dev,
>  						  "adi,conversion-start",
>  						  GPIOD_OUT_LOW);
> @@ -328,18 +340,6 @@ static int ad7476_probe(struct spi_device *spi)
>  	return ret;
>  }
>  
> -static int ad7476_remove(struct spi_device *spi)
> -{
> -	struct iio_dev *indio_dev = spi_get_drvdata(spi);
> -	struct ad7476_state *st = iio_priv(indio_dev);
> -
> -	iio_device_unregister(indio_dev);
> -	iio_triggered_buffer_cleanup(indio_dev);
> -	regulator_disable(st->reg);
> -
> -	return 0;
> -}
> -
>  static const struct spi_device_id ad7476_id[] = {
>  	{"ad7091", ID_AD7091R},
>  	{"ad7091r", ID_AD7091R},
> @@ -377,7 +377,6 @@ static struct spi_driver ad7476_driver = {
>  		.name	= "ad7476",
>  	},
>  	.probe		= ad7476_probe,
> -	.remove		= ad7476_remove,
>  	.id_table	= ad7476_id,
>  };
>  module_spi_driver(ad7476_driver);