| Message ID | 20230308073945.2336302-10-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | backlight: Convert to platform remove callback returning void | expand |
On Wed, 08 Mar 2023, Uwe Kleine-König wrote: > 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 (mostly) ignored > 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. > > 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/video/backlight/mt6370-backlight.c | 6 ++---- > 1 file changed, 2 insertions(+), 4 deletions(-) Applied, thanks -- Lee Jones [李琼斯]
diff --git a/drivers/video/backlight/mt6370-backlight.c b/drivers/video/backlight/mt6370-backlight.c index 623d4f2baca2..94422c956453 100644 --- a/drivers/video/backlight/mt6370-backlight.c +++ b/drivers/video/backlight/mt6370-backlight.c @@ -318,15 +318,13 @@ static int mt6370_bl_probe(struct platform_device *pdev) return 0; } -static int mt6370_bl_remove(struct platform_device *pdev) +static void mt6370_bl_remove(struct platform_device *pdev) { struct mt6370_priv *priv = platform_get_drvdata(pdev); struct backlight_device *bl_dev = priv->bl; bl_dev->props.brightness = 0; backlight_update_status(priv->bl); - - return 0; } static const struct of_device_id mt6370_bl_of_match[] = { @@ -342,7 +340,7 @@ static struct platform_driver mt6370_bl_driver = { .of_match_table = mt6370_bl_of_match, }, .probe = mt6370_bl_probe, - .remove = mt6370_bl_remove, + .remove_new = mt6370_bl_remove, }; module_platform_driver(mt6370_bl_driver);
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 (mostly) ignored 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. 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/video/backlight/mt6370-backlight.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)