[v2,06/14] iio: adc: qcom-spmi-adc5: Use device_for_each_child_node_scopd()

Commit Message

Jonathan Cameron Feb. 11, 2024, 7:25 p.m. UTC

From: Jonathan Cameron <[e-mail]>

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.

A slightly less convincing usecase than many as all the failure paths
are wrapped up in a call to a per fwnode_handle utility function.
The complexity in that function is sufficient that it makes sense to
factor it out even if it this new auto cleanup would enable simpler
returns if the code was inline at the call site. Hence I've left it alone.

Cc: Dmitry Baryshkov <[e-mail]>
Cc: Marijn Suijten <[e-mail]>
Signed-off-by: Jonathan Cameron <[e-mail]>
---
 drivers/iio/adc/qcom-spmi-adc5.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

Comments

Dmitry Baryshkov Feb. 12, 2024, 7:51 a.m. UTC | #1

On Sun, 11 Feb 2024 at 21:27, Jonathan Cameron <[e-mail]> wrote:
>
> From: Jonathan Cameron <[e-mail]>
>
> 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.
>
> A slightly less convincing usecase than many as all the failure paths
> are wrapped up in a call to a per fwnode_handle utility function.
> The complexity in that function is sufficient that it makes sense to
> factor it out even if it this new auto cleanup would enable simpler
> returns if the code was inline at the call site. Hence I've left it alone.
>
> Cc: Dmitry Baryshkov <[e-mail]>
> Cc: Marijn Suijten <[e-mail]>
> Signed-off-by: Jonathan Cameron <[e-mail]>
> ---
>  drivers/iio/adc/qcom-spmi-adc5.c | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
>

Reviewed-by: Dmitry Baryshkov <[e-mail]>

Patch

diff --git a/drivers/iio/adc/qcom-spmi-adc5.c b/drivers/iio/adc/qcom-spmi-adc5.c
index b6b612d733ff..9b69f40beed8 100644
--- a/drivers/iio/adc/qcom-spmi-adc5.c
+++ b/drivers/iio/adc/qcom-spmi-adc5.c
@@ -825,7 +825,6 @@  static int adc5_get_fw_data(struct adc5_chip *adc)
 	const struct adc5_channels *adc_chan;
 	struct iio_chan_spec *iio_chan;
 	struct adc5_channel_prop prop, *chan_props;
-	struct fwnode_handle *child;
 	unsigned int index = 0;
 	int ret;
 
@@ -849,12 +848,10 @@  static int adc5_get_fw_data(struct adc5_chip *adc)
 	if (!adc->data)
 		adc->data = &adc5_data_pmic;
 
-	device_for_each_child_node(adc->dev, child) {
+	device_for_each_child_node_scoped(adc->dev, child) {
 		ret = adc5_get_fw_channel_data(adc, &prop, child, adc->data);
-		if (ret) {
-			fwnode_handle_put(child);
+		if (ret)
 			return ret;
-		}
 
 		prop.scale_fn_type =
 			adc->data->adc_chans[prop.channel].scale_fn_type;