| Message ID | 20230405141009.3400693-3-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Headers | show |
| Series | usb: musb: Convert to platform remove callback returning void | expand |
Le mercredi 05 avril 2023 à 16:10 +0200, Uwe Kleine-König a écrit : > 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> Reviewed-by: Paul Cercueil <paul@crapouillou.net> Cheers, -Paul > --- > drivers/usb/musb/jz4740.c | 6 ++---- > 1 file changed, 2 insertions(+), 4 deletions(-) > > diff --git a/drivers/usb/musb/jz4740.c b/drivers/usb/musb/jz4740.c > index c7b1d2a394d9..5aabdd7e2511 100644 > --- a/drivers/usb/musb/jz4740.c > +++ b/drivers/usb/musb/jz4740.c > @@ -308,14 +308,12 @@ static int jz4740_probe(struct platform_device > *pdev) > return ret; > } > > -static int jz4740_remove(struct platform_device *pdev) > +static void jz4740_remove(struct platform_device *pdev) > { > struct jz4740_glue *glue = platform_get_drvdata(pdev); > > platform_device_unregister(glue->pdev); > clk_disable_unprepare(glue->clk); > - > - return 0; > } > > static const struct of_device_id jz4740_musb_of_match[] = { > @@ -327,7 +325,7 @@ MODULE_DEVICE_TABLE(of, jz4740_musb_of_match); > > static struct platform_driver jz4740_driver = { > .probe = jz4740_probe, > - .remove = jz4740_remove, > + .remove_new = jz4740_remove, > .driver = { > .name = "musb-jz4740", > .of_match_table = jz4740_musb_of_match,
On 5/4/23 16:10, 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/usb/musb/jz4740.c | 6 ++---- > 1 file changed, 2 insertions(+), 4 deletions(-) Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
diff --git a/drivers/usb/musb/jz4740.c b/drivers/usb/musb/jz4740.c index c7b1d2a394d9..5aabdd7e2511 100644 --- a/drivers/usb/musb/jz4740.c +++ b/drivers/usb/musb/jz4740.c @@ -308,14 +308,12 @@ static int jz4740_probe(struct platform_device *pdev) return ret; } -static int jz4740_remove(struct platform_device *pdev) +static void jz4740_remove(struct platform_device *pdev) { struct jz4740_glue *glue = platform_get_drvdata(pdev); platform_device_unregister(glue->pdev); clk_disable_unprepare(glue->clk); - - return 0; } static const struct of_device_id jz4740_musb_of_match[] = { @@ -327,7 +325,7 @@ MODULE_DEVICE_TABLE(of, jz4740_musb_of_match); static struct platform_driver jz4740_driver = { .probe = jz4740_probe, - .remove = jz4740_remove, + .remove_new = jz4740_remove, .driver = { .name = "musb-jz4740", .of_match_table = jz4740_musb_of_match,
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/usb/musb/jz4740.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)