mfd: pcf50633-adc: 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/20231123165627.492259-13-u.kleine-koenig@pengutronix.de
Signed-off-by: Lee Jones <lee@kernel.org>

diff --git a/drivers/mfd/pcf50633-adc.c b/drivers/mfd/pcf50633-adc.c
index 191b1bc6141c2fa4f2526a6b847d836f0b664664..ab55906f91f98a8eb3cc54e5e9bdaf3e52910535 100644 (file)
--- a/drivers/mfd/pcf50633-adc.c
+++ b/drivers/mfd/pcf50633-adc.c
@@ -218,7 +218,7 @@ static int pcf50633_adc_probe(struct platform_device *pdev)
        return 0;
 }
 
-static int pcf50633_adc_remove(struct platform_device *pdev)
+static void pcf50633_adc_remove(struct platform_device *pdev)
 {
        struct pcf50633_adc *adc = platform_get_drvdata(pdev);
        int i, head;
@@ -236,8 +236,6 @@ static int pcf50633_adc_remove(struct platform_device *pdev)
                kfree(adc->queue[i]);
 
        mutex_unlock(&adc->queue_mutex);
-
-       return 0;
 }
 
 static struct platform_driver pcf50633_adc_driver = {
@@ -245,7 +243,7 @@ static struct platform_driver pcf50633_adc_driver = {
                .name = "pcf50633-adc",
        },
        .probe = pcf50633_adc_probe,
-       .remove = pcf50633_adc_remove,
+       .remove_new = pcf50633_adc_remove,
 };
 
 module_platform_driver(pcf50633_adc_driver);