| Message ID | 20230507162616.1368908-21-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | Accepted, 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 06:25:43PM +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 the hisilicon drm drivers 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/hisilicon/kirin/dw_drm_dsi.c | 6 ++---- > drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c | 5 ++--- > 2 files changed, 4 insertions(+), 7 deletions(-) > > diff --git a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c > index d9978b79828c..566de4658719 100644 > --- a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c > +++ b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c > @@ -874,14 +874,12 @@ static int dsi_probe(struct platform_device *pdev) > return 0; > } > > -static int dsi_remove(struct platform_device *pdev) > +static void dsi_remove(struct platform_device *pdev) > { > struct dsi_data *data = platform_get_drvdata(pdev); > struct dw_dsi *dsi = &data->dsi; > > mipi_dsi_host_unregister(&dsi->host); > - > - return 0; > } > > static const struct of_device_id dsi_of_match[] = { > @@ -892,7 +890,7 @@ MODULE_DEVICE_TABLE(of, dsi_of_match); > > static struct platform_driver dsi_driver = { > .probe = dsi_probe, > - .remove = dsi_remove, > + .remove_new = dsi_remove, > .driver = { > .name = "dw-dsi", > .of_match_table = dsi_of_match, > diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c > index 9c5d49bf40c9..bc2948500311 100644 > --- a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c > +++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c > @@ -279,10 +279,9 @@ static int kirin_drm_platform_probe(struct platform_device *pdev) > return component_master_add_with_match(dev, &kirin_drm_ops, match); > } > > -static int kirin_drm_platform_remove(struct platform_device *pdev) > +static void kirin_drm_platform_remove(struct platform_device *pdev) > { > component_master_del(&pdev->dev, &kirin_drm_ops); > - return 0; > } > > static const struct of_device_id kirin_drm_dt_ids[] = { > @@ -295,7 +294,7 @@ MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids); > > static struct platform_driver kirin_drm_platform_driver = { > .probe = kirin_drm_platform_probe, > - .remove = kirin_drm_platform_remove, > + .remove_new = kirin_drm_platform_remove, > .driver = { > .name = "kirin-drm", > .of_match_table = kirin_drm_dt_ids, > -- > 2.39.2 >
diff --git a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c index d9978b79828c..566de4658719 100644 --- a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c +++ b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c @@ -874,14 +874,12 @@ static int dsi_probe(struct platform_device *pdev) return 0; } -static int dsi_remove(struct platform_device *pdev) +static void dsi_remove(struct platform_device *pdev) { struct dsi_data *data = platform_get_drvdata(pdev); struct dw_dsi *dsi = &data->dsi; mipi_dsi_host_unregister(&dsi->host); - - return 0; } static const struct of_device_id dsi_of_match[] = { @@ -892,7 +890,7 @@ MODULE_DEVICE_TABLE(of, dsi_of_match); static struct platform_driver dsi_driver = { .probe = dsi_probe, - .remove = dsi_remove, + .remove_new = dsi_remove, .driver = { .name = "dw-dsi", .of_match_table = dsi_of_match, diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c index 9c5d49bf40c9..bc2948500311 100644 --- a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c +++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c @@ -279,10 +279,9 @@ static int kirin_drm_platform_probe(struct platform_device *pdev) return component_master_add_with_match(dev, &kirin_drm_ops, match); } -static int kirin_drm_platform_remove(struct platform_device *pdev) +static void kirin_drm_platform_remove(struct platform_device *pdev) { component_master_del(&pdev->dev, &kirin_drm_ops); - return 0; } static const struct of_device_id kirin_drm_dt_ids[] = { @@ -295,7 +294,7 @@ MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids); static struct platform_driver kirin_drm_platform_driver = { .probe = kirin_drm_platform_probe, - .remove = kirin_drm_platform_remove, + .remove_new = kirin_drm_platform_remove, .driver = { .name = "kirin-drm", .of_match_table = kirin_drm_dt_ids,
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 the hisilicon drm drivers 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/hisilicon/kirin/dw_drm_dsi.c | 6 ++---- drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c | 5 ++--- 2 files changed, 4 insertions(+), 7 deletions(-)