iio: adc: twl6030-gpadc: 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/20230919174931.1417681-28-u.kleine-koenig@pengutronix.de
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/twl6030-gpadc.c b/drivers/iio/adc/twl6030-gpadc.c
index 32873fb..224e9cb 100644 (file)
--- a/drivers/iio/adc/twl6030-gpadc.c
+++ b/drivers/iio/adc/twl6030-gpadc.c
@@ -968,14 +968,12 @@ static int twl6030_gpadc_probe(struct platform_device *pdev)
        return iio_device_register(indio_dev);
 }
 
-static int twl6030_gpadc_remove(struct platform_device *pdev)
+static void twl6030_gpadc_remove(struct platform_device *pdev)
 {
        struct iio_dev *indio_dev = platform_get_drvdata(pdev);
 
        twl6030_gpadc_disable_irq(TWL6030_GPADC_RT_SW1_EOC_MASK);
        iio_device_unregister(indio_dev);
-
-       return 0;
 }
 
 static int twl6030_gpadc_suspend(struct device *pdev)
@@ -1007,7 +1005,7 @@ static DEFINE_SIMPLE_DEV_PM_OPS(twl6030_gpadc_pm_ops, twl6030_gpadc_suspend,
 
 static struct platform_driver twl6030_gpadc_driver = {
        .probe          = twl6030_gpadc_probe,
-       .remove         = twl6030_gpadc_remove,
+       .remove_new     = twl6030_gpadc_remove,
        .driver         = {
                .name   = DRIVER_NAME,
                .pm     = pm_sleep_ptr(&twl6030_gpadc_pm_ops),