Re: [PATCH v4 12/15] iio: addac: ad74413r: Use device_for_each_child_node_scoped()

From: "Nuno Sá" <noname.nuno@gmail.com>
To: Jonathan Cameron <jic23@kernel.org>,
	linux-iio@vger.kernel.org,
	"Rafael J . Wysocki" <rafael@kernel.org>,
	Len Brown <lenb@kernel.org>,
	linux-acpi@vger.kernel.org,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Daniel Scally <djrscally@gmail.com>,
	Heikki Krogerus <heikki.krogerus@linux.intel.com>,
	Sakari Ailus <sakari.ailus@linux.intel.com>,
	Julia Lawall <Julia.Lawall@inria.fr>
Cc: "Nuno Sá" <nuno.sa@analog.com>,
	"Cosmin Tanislav" <cosmin.tanislav@analog.com>,
	"Mihail Chindris" <mihail.chindris@analog.com>,
	"Rasmus Villemoes" <linux@rasmusvillemoes.dk>,
	"Tomislav Denis" <tomislav.denis@avl.com>,
	"Marek Vasut" <marex@denx.de>,
	"Olivier Moysan" <olivier.moysan@foss.st.com>,
	"Fabrice Gasnier" <fabrice.gasnier@foss.st.com>,
	"Lad Prabhakar" <prabhakar.mahadev-lad.rj@bp.renesas.com>,
	"Dmitry Baryshkov" <dmitry.baryshkov@linaro.org>,
	"Marijn Suijten" <marijn.suijten@somainline.org>,
	"Marius Cristea" <marius.cristea@microchip.com>,
	"Ibrahim Tilki" <Ibrahim.Tilki@analog.com>,
	"Peter Zijlstra" <peterz@infradead.org>,
	"Jonathan Cameron" <Jonathan.Cameron@huawei.com>
Subject: Re: [PATCH v4 12/15] iio: addac: ad74413r: Use device_for_each_child_node_scoped()
Date: Mon, 19 Feb 2024 14:55:38 +0100	[thread overview]
Message-ID: <b951d63b0c53e94ae9585ced6a9965c6befcd1dc.camel@gmail.com> (raw)
In-Reply-To: <20240217164249.921878-13-jic23@kernel.org>

On Sat, 2024-02-17 at 16:42 +0000, Jonathan Cameron wrote:
> From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> 
> Switching to the _scoped() version removes the need for manual
> calling of fwnode_handle_put() in the paths where the code
> exits the loop early. In this case that's all in error paths.
> 
> The use of fwnode_for_each_available_child_node() here is assumed
> to have been down to a false assumption that device_for_each_child_node()
> doesn't check avaialble - so this transition to the scoped
> device_for_each_child_node_scoped() is equivalent.
> 
> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> ---

Reviewed-by: Nuno Sa <nuno.sa@analog.com>

>  drivers/iio/addac/ad74413r.c | 10 ++--------
>  1 file changed, 2 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/iio/addac/ad74413r.c b/drivers/iio/addac/ad74413r.c
> index 7af3e4b8fe3b..cd26a16dc0ff 100644
> --- a/drivers/iio/addac/ad74413r.c
> +++ b/drivers/iio/addac/ad74413r.c
> @@ -1255,21 +1255,15 @@ static int ad74413r_parse_channel_config(struct
> iio_dev *indio_dev,
>  static int ad74413r_parse_channel_configs(struct iio_dev *indio_dev)
>  {
>  	struct ad74413r_state *st = iio_priv(indio_dev);
> -	struct fwnode_handle *channel_node = NULL;
>  	int ret;
>  
> -	fwnode_for_each_available_child_node(dev_fwnode(st->dev),
> channel_node) {
> +	device_for_each_child_node_scoped(st->dev, channel_node) {
>  		ret = ad74413r_parse_channel_config(indio_dev, channel_node);
>  		if (ret)
> -			goto put_channel_node;
> +			return ret;
>  	}
>  
>  	return 0;
> -
> -put_channel_node:
> -	fwnode_handle_put(channel_node);
> -
> -	return ret;
>  }
>  
>  static int ad74413r_setup_channels(struct iio_dev *indio_dev)