coresight: dummy: 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.

Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20231116173301.708873-9-u.kleine-koenig@pengutronix.de

diff --git a/drivers/hwtracing/coresight/coresight-dummy.c b/drivers/hwtracing/coresight/coresight-dummy.c
index e4deafae7bc2078b585f294cabb43dfa051fd234..ac70c0b491bebd647dd3f44a32f42731e2413e90 100644 (file)
--- a/drivers/hwtracing/coresight/coresight-dummy.c
+++ b/drivers/hwtracing/coresight/coresight-dummy.c
@@ -122,14 +122,13 @@ static int dummy_probe(struct platform_device *pdev)
        return 0;
 }
 
-static int dummy_remove(struct platform_device *pdev)
+static void dummy_remove(struct platform_device *pdev)
 {
        struct dummy_drvdata *drvdata = platform_get_drvdata(pdev);
        struct device *dev = &pdev->dev;
 
        pm_runtime_disable(dev);
        coresight_unregister(drvdata->csdev);
-       return 0;
 }
 
 static const struct of_device_id dummy_match[] = {
@@ -140,7 +139,7 @@ static const struct of_device_id dummy_match[] = {
 
 static struct platform_driver dummy_driver = {
        .probe  = dummy_probe,
-       .remove = dummy_remove,
+       .remove_new = dummy_remove,
        .driver = {
                .name   = "coresight-dummy",
                .of_match_table = dummy_match,