Re: [PATCH v5 03/13] iio: light: iqs621-als: use devm_blocking_notifier_chain_register()

On Sun, 16 Aug 2026 06:06:02 +0000
Eliav Farber <[email protected]> wrote:

> Replace the blocking_notifier_chain_register() +
> devm_add_action_or_reset() pattern with a single call to
> devm_blocking_notifier_chain_register(), removing the
> iqs621_als_notifier_unregister() callback.
> 
> Signed-off-by: Eliav Farber <[email protected]>
> Acked-by: Jonathan Cameron <[email protected]>
Applied (on top of merging the branch) to the testing branch of iio.git
Upgraded that ack to an SoB as a result.

> ---
>  drivers/iio/light/iqs621-als.c | 24 +++---------------------
>  1 file changed, 3 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/iio/light/iqs621-als.c b/drivers/iio/light/iqs621-als.c
> index cd5843e3e2c3..f9d215ef1970 100644
> --- a/drivers/iio/light/iqs621-als.c
> +++ b/drivers/iio/light/iqs621-als.c
> @@ -179,19 +179,6 @@ static int iqs621_als_notifier(struct notifier_block *notifier,
>  	return NOTIFY_OK;
>  }
>  
> -static void iqs621_als_notifier_unregister(void *context)
> -{
> -	struct iqs621_als_private *iqs621_als = context;
> -	struct iio_dev *indio_dev = iqs621_als->indio_dev;
> -	int ret;
> -
> -	ret = blocking_notifier_chain_unregister(&iqs621_als->iqs62x->nh,
> -						 &iqs621_als->notifier);
> -	if (ret)
> -		dev_err(indio_dev->dev.parent,
> -			"Failed to unregister notifier: %d\n", ret);
> -}
> -
>  static int iqs621_als_read_raw(struct iio_dev *indio_dev,
>  			       struct iio_chan_spec const *chan,
>  			       int *val, int *val2, long mask)
> @@ -563,19 +550,14 @@ static int iqs621_als_probe(struct platform_device *pdev)
>  	mutex_init(&iqs621_als->lock);
>  
>  	iqs621_als->notifier.notifier_call = iqs621_als_notifier;
> -	ret = blocking_notifier_chain_register(&iqs621_als->iqs62x->nh,
> -					       &iqs621_als->notifier);
> +	ret = devm_blocking_notifier_chain_register(&pdev->dev,
> +						    &iqs621_als->iqs62x->nh,
> +						    &iqs621_als->notifier);
>  	if (ret) {
>  		dev_err(&pdev->dev, "Failed to register notifier: %d\n", ret);
>  		return ret;
>  	}
>  
> -	ret = devm_add_action_or_reset(&pdev->dev,
> -				       iqs621_als_notifier_unregister,
> -				       iqs621_als);
> -	if (ret)
> -		return ret;
> -
>  	return devm_iio_device_register(&pdev->dev, indio_dev);
>  }
>