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 (mostly) ignored
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.
Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.
Cc: Uwe Kleine-König <[email protected]>
Signed-off-by: Yangtao Li <[email protected]>
---
drivers/thermal/rcar_gen3_thermal.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/thermal/rcar_gen3_thermal.c b/drivers/thermal/rcar_gen3_thermal.c
index 9029d01e029b..1405163caa34 100644
--- a/drivers/thermal/rcar_gen3_thermal.c
+++ b/drivers/thermal/rcar_gen3_thermal.c
@@ -432,14 +432,12 @@ static const struct of_device_id rcar_gen3_thermal_dt_ids[] = {
};
MODULE_DEVICE_TABLE(of, rcar_gen3_thermal_dt_ids);
-static int rcar_gen3_thermal_remove(struct platform_device *pdev)
+static void rcar_gen3_thermal_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
pm_runtime_put(dev);
pm_runtime_disable(dev);
-
- return 0;
}
static void rcar_gen3_hwmon_action(void *data)
@@ -594,7 +592,7 @@ static struct platform_driver rcar_gen3_thermal_driver = {
.of_match_table = rcar_gen3_thermal_dt_ids,
},
.probe = rcar_gen3_thermal_probe,
- .remove = rcar_gen3_thermal_remove,
+ .remove_new = rcar_gen3_thermal_remove,
};
module_platform_driver(rcar_gen3_thermal_driver);
--
2.39.0
On Wed, Jul 12, 2023 at 04:12:35PM +0800, Yangtao Li 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 (mostly) ignored
> 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.
>
> Trivially convert this driver from always returning zero in the remove
> callback to the void returning variant.
>
> Cc: Uwe Kleine-K?nig <[email protected]>
> Signed-off-by: Yangtao Li <[email protected]>
Reviewed-by: Uwe Kleine-K?nig <[email protected]>
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-K?nig |
Industrial Linux Solutions | https://www.pengutronix.de/ |
On Wed, Jul 12, 2023 at 10:16 AM Yangtao Li <[email protected]> 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 (mostly) ignored
> 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.
>
> Trivially convert this driver from always returning zero in the remove
> callback to the void returning variant.
>
> Cc: Uwe Kleine-König <[email protected]>
> Signed-off-by: Yangtao Li <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
On 2023-07-12 16:12:35 +0800, Yangtao Li 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 (mostly) ignored
> 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.
>
> Trivially convert this driver from always returning zero in the remove
> callback to the void returning variant.
>
> Cc: Uwe Kleine-König <[email protected]>
> Signed-off-by: Yangtao Li <[email protected]>
Reviewed-by: Niklas Söderlund <[email protected]>
> ---
> drivers/thermal/rcar_gen3_thermal.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/thermal/rcar_gen3_thermal.c b/drivers/thermal/rcar_gen3_thermal.c
> index 9029d01e029b..1405163caa34 100644
> --- a/drivers/thermal/rcar_gen3_thermal.c
> +++ b/drivers/thermal/rcar_gen3_thermal.c
> @@ -432,14 +432,12 @@ static const struct of_device_id rcar_gen3_thermal_dt_ids[] = {
> };
> MODULE_DEVICE_TABLE(of, rcar_gen3_thermal_dt_ids);
>
> -static int rcar_gen3_thermal_remove(struct platform_device *pdev)
> +static void rcar_gen3_thermal_remove(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
>
> pm_runtime_put(dev);
> pm_runtime_disable(dev);
> -
> - return 0;
> }
>
> static void rcar_gen3_hwmon_action(void *data)
> @@ -594,7 +592,7 @@ static struct platform_driver rcar_gen3_thermal_driver = {
> .of_match_table = rcar_gen3_thermal_dt_ids,
> },
> .probe = rcar_gen3_thermal_probe,
> - .remove = rcar_gen3_thermal_remove,
> + .remove_new = rcar_gen3_thermal_remove,
> };
> module_platform_driver(rcar_gen3_thermal_driver);
>
> --
> 2.39.0
>
--
Kind Regards,
Niklas Söderlund