iio: adc: mp2629: Convert to platform remove callback returning void

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>
Link: https://lore.kernel.org/r/20230919174931.1417681-16-u.kleine-koenig@pengutronix.de
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/mp2629_adc.c b/drivers/iio/adc/mp2629_adc.c
index 88e947f300cfda4fb9725421ef2d1adab3d3fa8f..7c66c2cd5be21ffda5d1c1d70efd18ab78054ef1 100644 (file)
--- a/drivers/iio/adc/mp2629_adc.c
+++ b/drivers/iio/adc/mp2629_adc.c
@@ -171,7 +171,7 @@ fail_disable:
        return ret;
 }
 
-static int mp2629_adc_remove(struct platform_device *pdev)
+static void mp2629_adc_remove(struct platform_device *pdev)
 {
        struct iio_dev *indio_dev = platform_get_drvdata(pdev);
        struct mp2629_adc *info = iio_priv(indio_dev);
@@ -184,8 +184,6 @@ static int mp2629_adc_remove(struct platform_device *pdev)
                                         MP2629_ADC_CONTINUOUS, 0);
        regmap_update_bits(info->regmap, MP2629_REG_ADC_CTRL,
                                         MP2629_ADC_START, 0);
-
-       return 0;
 }
 
 static const struct of_device_id mp2629_adc_of_match[] = {
@@ -200,7 +198,7 @@ static struct platform_driver mp2629_adc_driver = {
                .of_match_table = mp2629_adc_of_match,
        },
        .probe          = mp2629_adc_probe,
-       .remove         = mp2629_adc_remove,
+       .remove_new     = mp2629_adc_remove,
 };
 module_platform_driver(mp2629_adc_driver);