| Message ID | 20230507162616.1368908-40-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm: Convert to platform remove callback returning void | expand |
Hi Uwe, Thank you for the patch. On Sun, May 07, 2023 at 06:26:02PM +0200, 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> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > --- > drivers/gpu/drm/shmobile/shmob_drm_drv.c | 6 ++---- > 1 file changed, 2 insertions(+), 4 deletions(-) > > diff --git a/drivers/gpu/drm/shmobile/shmob_drm_drv.c b/drivers/gpu/drm/shmobile/shmob_drm_drv.c > index faacfee24763..fa32115320ca 100644 > --- a/drivers/gpu/drm/shmobile/shmob_drm_drv.c > +++ b/drivers/gpu/drm/shmobile/shmob_drm_drv.c > @@ -171,7 +171,7 @@ static DEFINE_SIMPLE_DEV_PM_OPS(shmob_drm_pm_ops, > * Platform driver > */ > > -static int shmob_drm_remove(struct platform_device *pdev) > +static void shmob_drm_remove(struct platform_device *pdev) > { > struct shmob_drm_device *sdev = platform_get_drvdata(pdev); > struct drm_device *ddev = sdev->ddev; > @@ -180,8 +180,6 @@ static int shmob_drm_remove(struct platform_device *pdev) > drm_kms_helper_poll_fini(ddev); > free_irq(sdev->irq, ddev); > drm_dev_put(ddev); > - > - return 0; > } > > static int shmob_drm_probe(struct platform_device *pdev) > @@ -285,7 +283,7 @@ static int shmob_drm_probe(struct platform_device *pdev) > > static struct platform_driver shmob_drm_platform_driver = { > .probe = shmob_drm_probe, > - .remove = shmob_drm_remove, > + .remove_new = shmob_drm_remove, > .driver = { > .name = "shmob-drm", > .pm = pm_sleep_ptr(&shmob_drm_pm_ops), > -- > 2.39.2 >
On Sun, May 7, 2023 at 6:31 PM Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 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> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Gr{oetje,eeting}s, Geert
diff --git a/drivers/gpu/drm/shmobile/shmob_drm_drv.c b/drivers/gpu/drm/shmobile/shmob_drm_drv.c index faacfee24763..fa32115320ca 100644 --- a/drivers/gpu/drm/shmobile/shmob_drm_drv.c +++ b/drivers/gpu/drm/shmobile/shmob_drm_drv.c @@ -171,7 +171,7 @@ static DEFINE_SIMPLE_DEV_PM_OPS(shmob_drm_pm_ops, * Platform driver */ -static int shmob_drm_remove(struct platform_device *pdev) +static void shmob_drm_remove(struct platform_device *pdev) { struct shmob_drm_device *sdev = platform_get_drvdata(pdev); struct drm_device *ddev = sdev->ddev; @@ -180,8 +180,6 @@ static int shmob_drm_remove(struct platform_device *pdev) drm_kms_helper_poll_fini(ddev); free_irq(sdev->irq, ddev); drm_dev_put(ddev); - - return 0; } static int shmob_drm_probe(struct platform_device *pdev) @@ -285,7 +283,7 @@ static int shmob_drm_probe(struct platform_device *pdev) static struct platform_driver shmob_drm_platform_driver = { .probe = shmob_drm_probe, - .remove = shmob_drm_remove, + .remove_new = shmob_drm_remove, .driver = { .name = "shmob-drm", .pm = pm_sleep_ptr(&shmob_drm_pm_ops),
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/gpu/drm/shmobile/shmob_drm_drv.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)