| Message ID | 20230507162616.1368908-8-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 06:25:30PM +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/cadence/cdns-dsi-core.c | 6 ++---- > 1 file changed, 2 insertions(+), 4 deletions(-) > > diff --git a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c > index 5dbfc7226b31..f50d65f54314 100644 > --- a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c > +++ b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c > @@ -1278,7 +1278,7 @@ static int cdns_dsi_drm_probe(struct platform_device *pdev) > return ret; > } > > -static int cdns_dsi_drm_remove(struct platform_device *pdev) > +static void cdns_dsi_drm_remove(struct platform_device *pdev) > { > struct cdns_dsi *dsi = platform_get_drvdata(pdev); > > @@ -1288,8 +1288,6 @@ static int cdns_dsi_drm_remove(struct platform_device *pdev) > dsi->platform_ops->deinit(dsi); > > pm_runtime_disable(&pdev->dev); > - > - return 0; > } > > static const struct of_device_id cdns_dsi_of_match[] = { > @@ -1303,7 +1301,7 @@ MODULE_DEVICE_TABLE(of, cdns_dsi_of_match); > > static struct platform_driver cdns_dsi_platform_driver = { > .probe = cdns_dsi_drm_probe, > - .remove = cdns_dsi_drm_remove, > + .remove_new = cdns_dsi_drm_remove, > .driver = { > .name = "cdns-dsi", > .of_match_table = cdns_dsi_of_match, > -- > 2.39.2 >
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c index 5dbfc7226b31..f50d65f54314 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c +++ b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c @@ -1278,7 +1278,7 @@ static int cdns_dsi_drm_probe(struct platform_device *pdev) return ret; } -static int cdns_dsi_drm_remove(struct platform_device *pdev) +static void cdns_dsi_drm_remove(struct platform_device *pdev) { struct cdns_dsi *dsi = platform_get_drvdata(pdev); @@ -1288,8 +1288,6 @@ static int cdns_dsi_drm_remove(struct platform_device *pdev) dsi->platform_ops->deinit(dsi); pm_runtime_disable(&pdev->dev); - - return 0; } static const struct of_device_id cdns_dsi_of_match[] = { @@ -1303,7 +1301,7 @@ MODULE_DEVICE_TABLE(of, cdns_dsi_of_match); static struct platform_driver cdns_dsi_platform_driver = { .probe = cdns_dsi_drm_probe, - .remove = cdns_dsi_drm_remove, + .remove_new = cdns_dsi_drm_remove, .driver = { .name = "cdns-dsi", .of_match_table = cdns_dsi_of_match,
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/cadence/cdns-dsi-core.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)