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[18/49] iio: adc: qcom-pm8xxx-xoadc: Convert to platform remove callback returning void

Message ID 20230919174931.1417681-19-u.kleine-koenig@pengutronix.de (mailing list archive)
State Not Applicable
Headers show
Series iio: Convert to platform remove callback returning void | expand

Commit Message

Uwe Kleine-König Sept. 19, 2023, 5:49 p.m. UTC
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.
To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new() which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 drivers/iio/adc/qcom-pm8xxx-xoadc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Comments

Konrad Dybcio Sept. 19, 2023, 9:14 p.m. UTC | #1
On 9/19/23 19:49, Uwe Kleine-König wrote:
> The .remove() callback for a platform driver returns an int which makes
> many driver authors wrongly assume it's possible to do error handling by
> returning an error code. However the value returned is ignored (apart
> from emitting a warning) and this typically results in resource leaks.
> To improve here there is a quest to make the remove callback return
> void. In the first step of this quest all drivers are converted to
> .remove_new() which already returns void. Eventually after all drivers
> are converted, .remove_new() will be renamed to .remove().
> 
> Trivially convert this driver from always returning zero in the remove
> callback to the void returning variant.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>

Konrad
diff mbox series

Patch

diff --git a/drivers/iio/adc/qcom-pm8xxx-xoadc.c b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
index 64a3aeb6261c..01c5586df56d 100644
--- a/drivers/iio/adc/qcom-pm8xxx-xoadc.c
+++ b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
@@ -957,7 +957,7 @@  static int pm8xxx_xoadc_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int pm8xxx_xoadc_remove(struct platform_device *pdev)
+static void pm8xxx_xoadc_remove(struct platform_device *pdev)
 {
 	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
 	struct pm8xxx_xoadc *adc = iio_priv(indio_dev);
@@ -965,8 +965,6 @@  static int pm8xxx_xoadc_remove(struct platform_device *pdev)
 	iio_device_unregister(indio_dev);
 
 	regulator_disable(adc->vref);
-
-	return 0;
 }
 
 static const struct xoadc_variant pm8018_variant = {
@@ -1019,7 +1017,7 @@  static struct platform_driver pm8xxx_xoadc_driver = {
 		.of_match_table = pm8xxx_xoadc_id_table,
 	},
 	.probe		= pm8xxx_xoadc_probe,
-	.remove		= pm8xxx_xoadc_remove,
+	.remove_new	= pm8xxx_xoadc_remove,
 };
 module_platform_driver(pm8xxx_xoadc_driver);