[PATCH 01/12] hwrng: atmel - Convert to platform remove callback returning void
Nicolas Ferre
nicolas.ferre at microchip.com
Mon Dec 11 00:57:39 PST 2023
On 10/12/2023 at 23:12, 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 at pengutronix.de>
Acked-by: Nicolas Ferre <nicolas.ferre at microchip.com>
> ---
> drivers/char/hw_random/atmel-rng.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/char/hw_random/atmel-rng.c b/drivers/char/hw_random/atmel-rng.c
> index a37367ebcbac..e9157255f851 100644
> --- a/drivers/char/hw_random/atmel-rng.c
> +++ b/drivers/char/hw_random/atmel-rng.c
> @@ -161,15 +161,13 @@ static int atmel_trng_probe(struct platform_device *pdev)
> return ret;
> }
>
> -static int atmel_trng_remove(struct platform_device *pdev)
> +static void atmel_trng_remove(struct platform_device *pdev)
> {
> struct atmel_trng *trng = platform_get_drvdata(pdev);
>
> atmel_trng_cleanup(trng);
> pm_runtime_disable(&pdev->dev);
> pm_runtime_set_suspended(&pdev->dev);
> -
> - return 0;
> }
>
> static int __maybe_unused atmel_trng_runtime_suspend(struct device *dev)
> @@ -218,7 +216,7 @@ MODULE_DEVICE_TABLE(of, atmel_trng_dt_ids);
>
> static struct platform_driver atmel_trng_driver = {
> .probe = atmel_trng_probe,
> - .remove = atmel_trng_remove,
> + .remove_new = atmel_trng_remove,
> .driver = {
> .name = "atmel-trng",
> .pm = pm_ptr(&atmel_trng_pm_ops),
> --
> 2.42.0
>
More information about the linux-arm-kernel
mailing list