diff mbox series

[04/27] drivers/thermal/rcar_gen3_thermal: Convert to platform remove callback returning void

Message ID 20230712081258.29254-4-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/rcar_gen3_thermal.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Comments

Uwe Kleine-König July 12, 2023, 10:07 a.m. UTC | #1 
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-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
Geert Uytterhoeven July 12, 2023, 11:44 a.m. UTC | #2 
On Wed, Jul 12, 2023 at 10:16 AM Yangtao Li <frank.li@vivo.com> 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: Geert Uytterhoeven <geert+renesas@glider.be>

Gr{oetje,eeting}s,

                        Geert
Niklas Söderlund July 12, 2023, 1:22 p.m. UTC | #3 
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 <u.kleine-koenig@pengutronix.de>
> Signed-off-by: Yangtao Li <frank.li@vivo.com>

Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

> ---
>  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
>
diff mbox series

Patch

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);