linux-kernel - [PATCH 3/7] macintosh: windfarm_pm121: Convert to platform remove callback returning void

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Message-ID:  <36f421f845449a9700f704379105aa5f5db5dd9e.1704900449.git.u.kleine-koenig@pengutronix.de>
Date: Wed, 10 Jan 2024 16:42:50 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Michael Ellerman <mpe@...erman.id.au>
Cc: linuxppc-dev@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 3/7] macintosh: windfarm_pm121: 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@...gutronix.de>
---
 drivers/macintosh/windfarm_pm121.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/macintosh/windfarm_pm121.c b/drivers/macintosh/windfarm_pm121.c
index 82500417ebee..cd45fbc4fe1c 100644
--- a/drivers/macintosh/windfarm_pm121.c
+++ b/drivers/macintosh/windfarm_pm121.c
@@ -992,15 +992,14 @@ static int pm121_probe(struct platform_device *ddev)
 	return 0;
 }

-static int pm121_remove(struct platform_device *ddev)
+static void pm121_remove(struct platform_device *ddev)
 {
 	wf_unregister_client(&pm121_events);
-	return 0;
 }

 static struct platform_driver pm121_driver = {
 	.probe = pm121_probe,
-	.remove = pm121_remove,
+	.remove_new = pm121_remove,
 	.driver = {
 		.name = "windfarm",
 		.bus = &platform_bus_type,
-- 
2.43.0