linux-kernel - Re: [PATCH 03/12] Input: ads7846 - use managed devm_device_add

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Date:   Fri, 29 Sep 2017 16:46:27 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Andi Shyti <andi@...zian.org>
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andi Shyti <andi.shyti@...sung.com>
Subject: Re: [PATCH 03/12] Input: ads7846 - use managed devm_device_add_group

On Sat, Sep 30, 2017 at 05:38:30AM +0900, Andi Shyti wrote:
> Commit 57b8ff070f98 ("driver core: add devm_device_add_group()
> and friends") has added the the managed version for creating
> sysfs group files.
> 
> Use devm_device_add_group instead of sysfs_create_group and
> remove the relative sysfs_remove_group and goto label.
> 
> Signed-off-by: Andi Shyti <andi@...zian.org>
> ---
>  drivers/input/touchscreen/ads7846.c | 8 ++------
>  1 file changed, 2 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
> index a2f45aefce08..597f4a2cca42 100644
> --- a/drivers/input/touchscreen/ads7846.c
> +++ b/drivers/input/touchscreen/ads7846.c
> @@ -1416,13 +1416,13 @@ static int ads7846_probe(struct spi_device *spi)
>  	else
>  		(void) ads7846_read12_ser(&spi->dev, READ_12BIT_SER(vaux));
>  
> -	err = sysfs_create_group(&spi->dev.kobj, &ads784x_attr_group);
> +	err = devm_device_add_group(&spi->dev, &ads784x_attr_group);
>  	if (err)
>  		goto err_remove_hwmon;
>  
>  	err = input_register_device(input_dev);
>  	if (err)
> -		goto err_remove_attr_group;
> +		goto err_remove_hwmon;
>  
>  	device_init_wakeup(&spi->dev, pdata->wakeup);
>  
> @@ -1435,8 +1435,6 @@ static int ads7846_probe(struct spi_device *spi)
>  
>  	return 0;
>  
> - err_remove_attr_group:
> -	sysfs_remove_group(&spi->dev.kobj, &ads784x_attr_group);
>   err_remove_hwmon:
>  	ads784x_hwmon_unregister(spi, ts);
>   err_free_irq:
> @@ -1462,8 +1460,6 @@ static int ads7846_remove(struct spi_device *spi)
>  {
>  	struct ads7846 *ts = spi_get_drvdata(spi);
>  
> -	sysfs_remove_group(&spi->dev.kobj, &ads784x_attr_group);
> -

Wrong ordering.

>  	ads7846_disable(ts);
>  	free_irq(ts->spi->irq, ts);
>  
> -- 
> 2.14.2
> 

-- 
Dmitry