| Message ID | 20230920125829.1478827-52-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | Mainlined |
| Commit | 33984b4f42b732075cdd19b93ef7608dca23b96f |
| Headers | show |
| Series | input: Convert to platform remove callback returning void | expand |
On Wed, Sep 20, 2023 at 02:58:28PM +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 ignored (apart > from emitting a warning) 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. Eventually after all drivers > are converted, .remove_new() will be renamed to .remove(). > > 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> > --- Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com> Thanks, Charles
diff --git a/drivers/input/touchscreen/wm831x-ts.c b/drivers/input/touchscreen/wm831x-ts.c index 319f57fb9af5..9cee26b63341 100644 --- a/drivers/input/touchscreen/wm831x-ts.c +++ b/drivers/input/touchscreen/wm831x-ts.c @@ -374,14 +374,12 @@ static int wm831x_ts_probe(struct platform_device *pdev) return error; } -static int wm831x_ts_remove(struct platform_device *pdev) +static void wm831x_ts_remove(struct platform_device *pdev) { struct wm831x_ts *wm831x_ts = platform_get_drvdata(pdev); free_irq(wm831x_ts->pd_irq, wm831x_ts); free_irq(wm831x_ts->data_irq, wm831x_ts); - - return 0; } static struct platform_driver wm831x_ts_driver = { @@ -389,7 +387,7 @@ static struct platform_driver wm831x_ts_driver = { .name = "wm831x-touch", }, .probe = wm831x_ts_probe, - .remove = wm831x_ts_remove, + .remove_new = wm831x_ts_remove, }; module_platform_driver(wm831x_ts_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 ignored (apart from emitting a warning) 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. Eventually after all drivers are converted, .remove_new() will be renamed to .remove(). 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/input/touchscreen/wm831x-ts.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)