iio: adc: npcm: 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/20230919174931.1417681-18-u.kleine-koenig@pengutronix.de
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/npcm_adc.c b/drivers/iio/adc/npcm_adc.c
index 3d9207c160eb997b8f115512e244de4b3d77d302..3a55465951e7938311e5f1c4e668f7c8770b82a6 100644 (file)
--- a/drivers/iio/adc/npcm_adc.c
+++ b/drivers/iio/adc/npcm_adc.c
@@ -320,7 +320,7 @@ err_disable_clk:
        return ret;
 }
 
-static int npcm_adc_remove(struct platform_device *pdev)
+static void npcm_adc_remove(struct platform_device *pdev)
 {
        struct iio_dev *indio_dev = platform_get_drvdata(pdev);
        struct npcm_adc *info = iio_priv(indio_dev);
@@ -333,13 +333,11 @@ static int npcm_adc_remove(struct platform_device *pdev)
        if (!IS_ERR(info->vref))
                regulator_disable(info->vref);
        clk_disable_unprepare(info->adc_clk);
-
-       return 0;
 }
 
 static struct platform_driver npcm_adc_driver = {
        .probe          = npcm_adc_probe,
-       .remove         = npcm_adc_remove,
+       .remove_new     = npcm_adc_remove,
        .driver         = {
                .name   = "npcm_adc",
                .of_match_table = npcm_adc_match,