[09/12] hwrng: omap - 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/omap-rng.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Patch

diff --git a/drivers/char/hw_random/omap-rng.c b/drivers/char/hw_random/omap-rng.c
index be03f76a2a80..d4c02e900466 100644
--- a/drivers/char/hw_random/omap-rng.c
+++ b/drivers/char/hw_random/omap-rng.c
@@ -509,7 +509,7 @@  static int omap_rng_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int omap_rng_remove(struct platform_device *pdev)
+static void omap_rng_remove(struct platform_device *pdev)
 {
 	struct omap_rng_dev *priv = platform_get_drvdata(pdev);
 
@@ -521,8 +521,6 @@  static int omap_rng_remove(struct platform_device *pdev)
 
 	clk_disable_unprepare(priv->clk);
 	clk_disable_unprepare(priv->clk_reg);
-
-	return 0;
 }
 
 static int __maybe_unused omap_rng_suspend(struct device *dev)
@@ -560,7 +558,7 @@  static struct platform_driver omap_rng_driver = {
 		.of_match_table = of_match_ptr(omap_rng_of_match),
 	},
 	.probe		= omap_rng_probe,
-	.remove		= omap_rng_remove,
+	.remove_new	= omap_rng_remove,
 };
 
 module_platform_driver(omap_rng_driver);