diff mbox series

[02/27] thermal/drivers/armada: Convert to platform remove callback returning void

Message ID 20230712081258.29254-2-frank.li@vivo.com
State New
Headers
Series [01/27] thermal/drivers/amlogic: Convert to platform remove callback returning void |

Commit Message

李扬韬 July 12, 2023, 8:12 a.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 (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 <u.kleine-koenig@pengutronix.de>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
 drivers/thermal/armada_thermal.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Comments

Miquel Raynal July 12, 2023, 8:46 a.m. UTC | #1 
Hi Yangtao,

frank.li@vivo.com wrote on Wed, 12 Jul 2023 16:12:33 +0800:

> 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 <u.kleine-koenig@pengutronix.de>
> Signed-off-by: Yangtao Li <frank.li@vivo.com>

Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>

> ---
>  drivers/thermal/armada_thermal.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c
> index 9f6dc4fc9112..94783e374d37 100644
> --- a/drivers/thermal/armada_thermal.c
> +++ b/drivers/thermal/armada_thermal.c
> @@ -964,19 +964,17 @@ static int armada_thermal_probe(struct platform_device *pdev)
>  	return 0;
>  }
>  
> -static int armada_thermal_exit(struct platform_device *pdev)
> +static void armada_thermal_exit(struct platform_device *pdev)
>  {
>  	struct armada_drvdata *drvdata = platform_get_drvdata(pdev);
>  
>  	if (drvdata->type == LEGACY)
>  		thermal_zone_device_unregister(drvdata->data.tz);
> -
> -	return 0;
>  }
>  
>  static struct platform_driver armada_thermal_driver = {
>  	.probe = armada_thermal_probe,
> -	.remove = armada_thermal_exit,
> +	.remove_new = armada_thermal_exit,
>  	.driver = {
>  		.name = "armada_thermal",
>  		.of_match_table = armada_thermal_id_table,


Thanks,
Miquèl
Uwe Kleine-König July 12, 2023, 12:44 p.m. UTC | #2 
On Wed, Jul 12, 2023 at 04:12:33PM +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 <u.kleine-koenig@pengutronix.de>
> Signed-off-by: Yangtao Li <frank.li@vivo.com>

Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

Best regards
Uwe
diff mbox series

Patch

diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c
index 9f6dc4fc9112..94783e374d37 100644
--- a/drivers/thermal/armada_thermal.c
+++ b/drivers/thermal/armada_thermal.c
@@ -964,19 +964,17 @@  static int armada_thermal_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int armada_thermal_exit(struct platform_device *pdev)
+static void armada_thermal_exit(struct platform_device *pdev)
 {
 	struct armada_drvdata *drvdata = platform_get_drvdata(pdev);
 
 	if (drvdata->type == LEGACY)
 		thermal_zone_device_unregister(drvdata->data.tz);
-
-	return 0;
 }
 
 static struct platform_driver armada_thermal_driver = {
 	.probe = armada_thermal_probe,
-	.remove = armada_thermal_exit,
+	.remove_new = armada_thermal_exit,
 	.driver = {
 		.name = "armada_thermal",
 		.of_match_table = armada_thermal_id_table,