| Message ID | 20230326143224.572654-55-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | media: Convert to platform remove callback returning void | expand |
On Sun, Mar 26, 2023 at 4:33 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
Quoting Uwe Kleine-König (2023-03-26 15:31:19) > 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: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> > --- > drivers/media/platform/renesas/rcar_fdp1.c | 6 ++---- > 1 file changed, 2 insertions(+), 4 deletions(-) > > diff --git a/drivers/media/platform/renesas/rcar_fdp1.c b/drivers/media/platform/renesas/rcar_fdp1.c > index 37ecf489d112..d80b3214dfae 100644 > --- a/drivers/media/platform/renesas/rcar_fdp1.c > +++ b/drivers/media/platform/renesas/rcar_fdp1.c > @@ -2396,7 +2396,7 @@ static int fdp1_probe(struct platform_device *pdev) > return ret; > } > > -static int fdp1_remove(struct platform_device *pdev) > +static void fdp1_remove(struct platform_device *pdev) > { > struct fdp1_dev *fdp1 = platform_get_drvdata(pdev); > > @@ -2404,8 +2404,6 @@ static int fdp1_remove(struct platform_device *pdev) > video_unregister_device(&fdp1->vfd); > v4l2_device_unregister(&fdp1->v4l2_dev); > pm_runtime_disable(&pdev->dev); > - > - return 0; > } > > static int __maybe_unused fdp1_pm_runtime_suspend(struct device *dev) > @@ -2441,7 +2439,7 @@ MODULE_DEVICE_TABLE(of, fdp1_dt_ids); > > static struct platform_driver fdp1_pdrv = { > .probe = fdp1_probe, > - .remove = fdp1_remove, > + .remove_new = fdp1_remove, > .driver = { > .name = DRIVER_NAME, > .of_match_table = fdp1_dt_ids, > -- > 2.39.2 >
diff --git a/drivers/media/platform/renesas/rcar_fdp1.c b/drivers/media/platform/renesas/rcar_fdp1.c index 37ecf489d112..d80b3214dfae 100644 --- a/drivers/media/platform/renesas/rcar_fdp1.c +++ b/drivers/media/platform/renesas/rcar_fdp1.c @@ -2396,7 +2396,7 @@ static int fdp1_probe(struct platform_device *pdev) return ret; } -static int fdp1_remove(struct platform_device *pdev) +static void fdp1_remove(struct platform_device *pdev) { struct fdp1_dev *fdp1 = platform_get_drvdata(pdev); @@ -2404,8 +2404,6 @@ static int fdp1_remove(struct platform_device *pdev) video_unregister_device(&fdp1->vfd); v4l2_device_unregister(&fdp1->v4l2_dev); pm_runtime_disable(&pdev->dev); - - return 0; } static int __maybe_unused fdp1_pm_runtime_suspend(struct device *dev) @@ -2441,7 +2439,7 @@ MODULE_DEVICE_TABLE(of, fdp1_dt_ids); static struct platform_driver fdp1_pdrv = { .probe = fdp1_probe, - .remove = fdp1_remove, + .remove_new = fdp1_remove, .driver = { .name = DRIVER_NAME, .of_match_table = fdp1_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 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/media/platform/renesas/rcar_fdp1.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)