linux-kernel - Re: [PATCH v3 2/3] Input: ad7897 - use devm_add_action_or

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Date:   Mon, 22 Jan 2018 17:40:09 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Andi Shyti <andi@...zian.org>
Cc:     Michael Hennerich <michael.hennerich@...log.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andi Shyti <andi.shyti@...sung.com>
Subject: Re: [PATCH v3 2/3] Input: ad7897 - use devm_add_action_or_reset to
 disable the device

Hi Andi,

On Wed, Nov 08, 2017 at 05:50:19PM +0200, Andi Shyti wrote:
> Use the ad7877_disable() as a custom action when the driver gets
> removed instead of calling it from the remove function.
> 
> Because ad7877_remove() was just calling the disable function,
> get rid of it.
> 

There is not reason why this change needs to be split from the first
one; I folded it back in and applied, thank you.

> CC: Michael Hennerich <michael.hennerich@...log.com>
> Signed-off-by: Andi Shyti <andi@...zian.org>
> ---
>  drivers/input/touchscreen/ad7877.c | 20 +++++++-------------
>  1 file changed, 7 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/input/touchscreen/ad7877.c b/drivers/input/touchscreen/ad7877.c
> index dd59e4a5eb7d..04ab8fbc8184 100644
> --- a/drivers/input/touchscreen/ad7877.c
> +++ b/drivers/input/touchscreen/ad7877.c
> @@ -417,8 +417,10 @@ static irqreturn_t ad7877_irq(int irq, void *handle)
>  	return IRQ_HANDLED;
>  }
>  
> -static void ad7877_disable(struct ad7877 *ts)
> +static void ad7877_disable(void *data)
>  {
> +	struct ad7877 *ts = data;
> +
>  	mutex_lock(&ts->mutex);
>  
>  	if (!ts->disabled) {
> @@ -712,6 +714,10 @@ static int ad7877_probe(struct spi_device *spi)
>  	if (!ts || !input_dev)
>  		return -ENOMEM;
>  
> +	err = devm_add_action_or_reset(&spi->dev, ad7877_disable, ts);
> +	if (err)
> +		return err;
> +
>  	spi_set_drvdata(spi, ts);
>  	ts->spi = spi;
>  	ts->input = input_dev;
> @@ -787,17 +793,6 @@ static int ad7877_probe(struct spi_device *spi)
>  	return input_register_device(input_dev);
>  }
>  
> -static int ad7877_remove(struct spi_device *spi)
> -{
> -	struct ad7877 *ts = spi_get_drvdata(spi);
> -
> -	ad7877_disable(ts);
> -
> -	dev_dbg(&spi->dev, "unregistered touchscreen\n");
> -
> -	return 0;
> -}
> -
>  static int __maybe_unused ad7877_suspend(struct device *dev)
>  {
>  	struct ad7877 *ts = dev_get_drvdata(dev);
> @@ -824,7 +819,6 @@ static struct spi_driver ad7877_driver = {
>  		.pm	= &ad7877_pm,
>  	},
>  	.probe		= ad7877_probe,
> -	.remove		= ad7877_remove,
>  };
>  
>  module_spi_driver(ad7877_driver);
> -- 
> 2.15.0
> 

-- 
Dmitry