| Message ID | 20230507162616.1368908-13-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 06:25:35PM +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/bridge/nwl-dsi.c | 5 ++--- > 1 file changed, 2 insertions(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/bridge/nwl-dsi.c b/drivers/gpu/drm/bridge/nwl-dsi.c > index 6dc2a4e191d7..4a5f5c4f5dcc 100644 > --- a/drivers/gpu/drm/bridge/nwl-dsi.c > +++ b/drivers/gpu/drm/bridge/nwl-dsi.c > @@ -1199,7 +1199,7 @@ static int nwl_dsi_probe(struct platform_device *pdev) > return 0; > } > > -static int nwl_dsi_remove(struct platform_device *pdev) > +static void nwl_dsi_remove(struct platform_device *pdev) > { > struct nwl_dsi *dsi = platform_get_drvdata(pdev); > > @@ -1207,12 +1207,11 @@ static int nwl_dsi_remove(struct platform_device *pdev) > mipi_dsi_host_unregister(&dsi->dsi_host); > drm_bridge_remove(&dsi->bridge); > pm_runtime_disable(&pdev->dev); > - return 0; > } > > static struct platform_driver nwl_dsi_driver = { > .probe = nwl_dsi_probe, > - .remove = nwl_dsi_remove, > + .remove_new = nwl_dsi_remove, > .driver = { > .of_match_table = nwl_dsi_dt_ids, > .name = DRV_NAME, > -- > 2.39.2 >
diff --git a/drivers/gpu/drm/bridge/nwl-dsi.c b/drivers/gpu/drm/bridge/nwl-dsi.c index 6dc2a4e191d7..4a5f5c4f5dcc 100644 --- a/drivers/gpu/drm/bridge/nwl-dsi.c +++ b/drivers/gpu/drm/bridge/nwl-dsi.c @@ -1199,7 +1199,7 @@ static int nwl_dsi_probe(struct platform_device *pdev) return 0; } -static int nwl_dsi_remove(struct platform_device *pdev) +static void nwl_dsi_remove(struct platform_device *pdev) { struct nwl_dsi *dsi = platform_get_drvdata(pdev); @@ -1207,12 +1207,11 @@ static int nwl_dsi_remove(struct platform_device *pdev) mipi_dsi_host_unregister(&dsi->dsi_host); drm_bridge_remove(&dsi->bridge); pm_runtime_disable(&pdev->dev); - return 0; } static struct platform_driver nwl_dsi_driver = { .probe = nwl_dsi_probe, - .remove = nwl_dsi_remove, + .remove_new = nwl_dsi_remove, .driver = { .of_match_table = nwl_dsi_dt_ids, .name = DRV_NAME,
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/bridge/nwl-dsi.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)