| Message ID | 20230326143224.572654-54-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
> > 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: Fabrizio Castro <fabrizio.castro.jz@renesas.com> > --- > drivers/media/platform/renesas/rcar_drif.c | 8 +++----- > 1 file changed, 3 insertions(+), 5 deletions(-) > > diff --git a/drivers/media/platform/renesas/rcar_drif.c > b/drivers/media/platform/renesas/rcar_drif.c > index 3fec41f6e964..3a92f4535c18 100644 > --- a/drivers/media/platform/renesas/rcar_drif.c > +++ b/drivers/media/platform/renesas/rcar_drif.c > @@ -1433,19 +1433,17 @@ static int rcar_drif_probe(struct > platform_device *pdev) > } > > /* DRIF channel remove */ > -static int rcar_drif_remove(struct platform_device *pdev) > +static void rcar_drif_remove(struct platform_device *pdev) > { > struct rcar_drif *ch = platform_get_drvdata(pdev); > struct rcar_drif_sdr *sdr = ch->sdr; > > /* Channel 0 will be the SDR instance */ > if (ch->num) > - return 0; > + return; > > /* SDR instance */ > rcar_drif_sdr_remove(sdr); > - > - return 0; > } > > /* FIXME: Implement suspend/resume support */ > @@ -1476,7 +1474,7 @@ static struct platform_driver rcar_drif_driver = > { > .pm = &rcar_drif_pm_ops, > }, > .probe = rcar_drif_probe, > - .remove = rcar_drif_remove, > + .remove_new = rcar_drif_remove, > }; > > module_platform_driver(rcar_drif_driver); > -- > 2.39.2
diff --git a/drivers/media/platform/renesas/rcar_drif.c b/drivers/media/platform/renesas/rcar_drif.c index 3fec41f6e964..3a92f4535c18 100644 --- a/drivers/media/platform/renesas/rcar_drif.c +++ b/drivers/media/platform/renesas/rcar_drif.c @@ -1433,19 +1433,17 @@ static int rcar_drif_probe(struct platform_device *pdev) } /* DRIF channel remove */ -static int rcar_drif_remove(struct platform_device *pdev) +static void rcar_drif_remove(struct platform_device *pdev) { struct rcar_drif *ch = platform_get_drvdata(pdev); struct rcar_drif_sdr *sdr = ch->sdr; /* Channel 0 will be the SDR instance */ if (ch->num) - return 0; + return; /* SDR instance */ rcar_drif_sdr_remove(sdr); - - return 0; } /* FIXME: Implement suspend/resume support */ @@ -1476,7 +1474,7 @@ static struct platform_driver rcar_drif_driver = { .pm = &rcar_drif_pm_ops, }, .probe = rcar_drif_probe, - .remove = rcar_drif_remove, + .remove_new = rcar_drif_remove, }; module_platform_driver(rcar_drif_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/media/platform/renesas/rcar_drif.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-)