diff mbox series

[08/14] power: reset: mt6323-poweroff: Convert to platform remove callback returning void

Message ID 20231104211501.3676352-24-u.kleine-koenig@pengutronix.de (mailing list archive)
State New, archived
Headers show
Series power: reset: Drop platform_driver_probe() and convert to platform remove callback returning void | expand

Commit Message

Uwe Kleine-König Nov. 4, 2023, 9:15 p.m. UTC
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>
---
 drivers/power/reset/mt6323-poweroff.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Comments

AngeloGioacchino Del Regno Nov. 6, 2023, 8:21 a.m. UTC | #1
Il 04/11/23 22:15, Uwe Kleine-König ha scritto:
> 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>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
diff mbox series

Patch

diff --git a/drivers/power/reset/mt6323-poweroff.c b/drivers/power/reset/mt6323-poweroff.c
index 108167f7738b..57a63c0ab7fb 100644
--- a/drivers/power/reset/mt6323-poweroff.c
+++ b/drivers/power/reset/mt6323-poweroff.c
@@ -70,12 +70,10 @@  static int mt6323_pwrc_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int mt6323_pwrc_remove(struct platform_device *pdev)
+static void mt6323_pwrc_remove(struct platform_device *pdev)
 {
 	if (pm_power_off == &mt6323_do_pwroff)
 		pm_power_off = NULL;
-
-	return 0;
 }
 
 static const struct of_device_id mt6323_pwrc_dt_match[] = {
@@ -86,7 +84,7 @@  MODULE_DEVICE_TABLE(of, mt6323_pwrc_dt_match);
 
 static struct platform_driver mt6323_pwrc_driver = {
 	.probe          = mt6323_pwrc_probe,
-	.remove         = mt6323_pwrc_remove,
+	.remove_new     = mt6323_pwrc_remove,
 	.driver         = {
 		.name   = "mt6323-pwrc",
 		.of_match_table = mt6323_pwrc_dt_match,