[08/12] hwrng: npcm - Convert to platform remove callback returning void

Commit Message

Uwe Kleine-König Dec. 10, 2023, 10:12 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 <[e-mail]>
---
 drivers/char/hw_random/npcm-rng.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Patch

diff --git a/drivers/char/hw_random/npcm-rng.c b/drivers/char/hw_random/npcm-rng.c
index 8a304b754217..bce8c4829a1f 100644
--- a/drivers/char/hw_random/npcm-rng.c
+++ b/drivers/char/hw_random/npcm-rng.c
@@ -126,15 +126,13 @@  static int npcm_rng_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int npcm_rng_remove(struct platform_device *pdev)
+static void npcm_rng_remove(struct platform_device *pdev)
 {
 	struct npcm_rng *priv = platform_get_drvdata(pdev);
 
 	devm_hwrng_unregister(&pdev->dev, &priv->rng);
 	pm_runtime_disable(&pdev->dev);
 	pm_runtime_set_suspended(&pdev->dev);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM
@@ -178,7 +176,7 @@  static struct platform_driver npcm_rng_driver = {
 		.of_match_table = of_match_ptr(rng_dt_id),
 	},
 	.probe		= npcm_rng_probe,
-	.remove		= npcm_rng_remove,
+	.remove_new	= npcm_rng_remove,
 };
 
 module_platform_driver(npcm_rng_driver);