diff mbox series

[8/8] regulator: wm8350: Convert to platform remove callback returning void

Message ID 1f7bbc545829a1cc3df40be0424fe46d7449fb72.1701778038.git.u.kleine-koenig@pengutronix.de
State New
Headers
Series regulator: Convert to platform remove callback returning void |

Commit Message

Uwe Kleine-König Dec. 5, 2023, 12:26 p.m. UTC 
  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/regulator/wm8350-regulator.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Comments

Charles Keepax Dec. 5, 2023, 1:06 p.m. UTC | #1 
On Tue, Dec 05, 2023 at 01:26:23PM +0100, 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 mbox series

Patch

diff --git a/drivers/regulator/wm8350-regulator.c b/drivers/regulator/wm8350-regulator.c
index 1445bafcab40..9939a5d2cbec 100644
--- a/drivers/regulator/wm8350-regulator.c
+++ b/drivers/regulator/wm8350-regulator.c
@@ -1158,14 +1158,12 @@  static int wm8350_regulator_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int wm8350_regulator_remove(struct platform_device *pdev)
+static void wm8350_regulator_remove(struct platform_device *pdev)
 {
 	struct regulator_dev *rdev = platform_get_drvdata(pdev);
 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
 
 	wm8350_free_irq(wm8350, wm8350_reg[pdev->id].irq, rdev);
-
-	return 0;
 }
 
 int wm8350_register_regulator(struct wm8350 *wm8350, int reg,
@@ -1306,7 +1304,7 @@  EXPORT_SYMBOL_GPL(wm8350_register_led);
 
 static struct platform_driver wm8350_regulator_driver = {
 	.probe = wm8350_regulator_probe,
-	.remove = wm8350_regulator_remove,
+	.remove_new = wm8350_regulator_remove,
 	.driver		= {
 		.name	= "wm8350-regulator",
 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,