linux-kernel - Re: [PATCH] iio: accel: dmard10: convert probe to device-managed functions

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Date:   Sat, 17 Jul 2021 18:53:04 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Alexandru Ardelean <aardelean@...iqon.com>
Cc:     linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iio: accel: dmard10: convert probe to device-managed
 functions

On Wed, 30 Jun 2021 15:15:09 +0300
Alexandru Ardelean <aardelean@...iqon.com> wrote:

> This is another simple conversion to device-managed functions, requiring
> the use of devm_iio_device_register() and moving the disabling of the
> device on a devm_add_action_or_reset() hook.
> 
> The i2c_set_clientdata() can be removed, as the PM functions can work with
> just the device object, to obtain the i2c_client object.
> 
> Signed-off-by: Alexandru Ardelean <aardelean@...iqon.com>

Applied,

> ---
>  drivers/iio/accel/dmard10.c | 27 ++++++++++-----------------
>  1 file changed, 10 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/iio/accel/dmard10.c b/drivers/iio/accel/dmard10.c
> index e84bf8db1e89..f9f173eec202 100644
> --- a/drivers/iio/accel/dmard10.c
> +++ b/drivers/iio/accel/dmard10.c
> @@ -170,6 +170,11 @@ static const struct iio_info dmard10_info = {
>  	.read_raw	= dmard10_read_raw,
>  };
>  
> +static void dmard10_shutdown_cleanup(void *client)
> +{
> +	dmard10_shutdown(client);
> +}
> +
>  static int dmard10_probe(struct i2c_client *client,
>  			const struct i2c_device_id *id)
>  {
> @@ -194,7 +199,6 @@ static int dmard10_probe(struct i2c_client *client,
>  
>  	data = iio_priv(indio_dev);
>  	data->client = client;
> -	i2c_set_clientdata(client, indio_dev);
>  
>  	indio_dev->info = &dmard10_info;
>  	indio_dev->name = "dmard10";
> @@ -206,22 +210,12 @@ static int dmard10_probe(struct i2c_client *client,
>  	if (ret < 0)
>  		return ret;
>  
> -	ret = iio_device_register(indio_dev);
> -	if (ret < 0) {
> -		dev_err(&client->dev, "device_register failed\n");
> -		dmard10_shutdown(client);
> -	}
> -
> -	return ret;
> -}
> -
> -static int dmard10_remove(struct i2c_client *client)
> -{
> -	struct iio_dev *indio_dev = i2c_get_clientdata(client);
> -
> -	iio_device_unregister(indio_dev);
> +	ret = devm_add_action_or_reset(&client->dev, dmard10_shutdown_cleanup,
> +				       client);
> +	if (ret)
> +		return ret;
>  
> -	return dmard10_shutdown(client);
> +	return devm_iio_device_register(&client->dev, indio_dev);
>  }
>  
>  #ifdef CONFIG_PM_SLEEP
> @@ -250,7 +244,6 @@ static struct i2c_driver dmard10_driver = {
>  		.pm = &dmard10_pm_ops,
>  	},
>  	.probe		= dmard10_probe,
> -	.remove		= dmard10_remove,
>  	.id_table	= dmard10_i2c_id,
>  };
>