From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Thu, 16 Nov 2023 17:33:04 +0000 (+0100)
Subject: coresight: funnel: Convert to platform remove callback returning void
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=858aebb52cc0f4b3446842fb5169bdf33fc136d4;p=linux.git

coresight: funnel: 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/20231116173301.708873-11-u.kleine-koenig@pengutronix.de
---

diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
index b8e150e45b272..a5b1fc787766a 100644
--- a/drivers/hwtracing/coresight/coresight-funnel.c
+++ b/drivers/hwtracing/coresight/coresight-funnel.c
@@ -335,11 +335,10 @@ static int static_funnel_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int static_funnel_remove(struct platform_device *pdev)
+static void static_funnel_remove(struct platform_device *pdev)
 {
 	funnel_remove(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
-	return 0;
 }
 
 static const struct of_device_id static_funnel_match[] = {
@@ -360,7 +359,7 @@ MODULE_DEVICE_TABLE(acpi, static_funnel_ids);
 
 static struct platform_driver static_funnel_driver = {
 	.probe          = static_funnel_probe,
-	.remove          = static_funnel_remove,
+	.remove_new      = static_funnel_remove,
 	.driver         = {
 		.name   = "coresight-static-funnel",
 		/* THIS_MODULE is taken care of by platform_driver_register() */