diff mbox series

[v2,49/61] mmc: sdhci-esdhc-mcf: Convert to platform remove callback returning void

Message ID 20230726040041.26267-49-frank.li@vivo.com
State New
Headers
Series [v2,01/61] mmc: sunxi: Convert to platform remove callback returning void |

Commit Message

李扬韬 July 26, 2023, 4 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>
Acked-by: Angelo Dureghello <angelo.dureghello@timesys.com>
---
 drivers/mmc/host/sdhci-esdhc-mcf.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Comments

Angelo Dureghello July 26, 2023, 6:14 a.m. UTC | #1 
Hi Yangtao,

Acked-by: Angelo Dureghello <angelo.dureghello@timesys.com>


On Wed, Jul 26, 2023 at 6:02 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>
> Acked-by: Angelo Dureghello <angelo.dureghello@timesys.com>
> ---
>  drivers/mmc/host/sdhci-esdhc-mcf.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-esdhc-mcf.c b/drivers/mmc/host/sdhci-esdhc-mcf.c
> index 05926bf5ecf9..a07f8333cd6b 100644
> --- a/drivers/mmc/host/sdhci-esdhc-mcf.c
> +++ b/drivers/mmc/host/sdhci-esdhc-mcf.c
> @@ -489,7 +489,7 @@ static int sdhci_esdhc_mcf_probe(struct platform_device *pdev)
>         return err;
>  }
>
> -static int sdhci_esdhc_mcf_remove(struct platform_device *pdev)
> +static void sdhci_esdhc_mcf_remove(struct platform_device *pdev)
>  {
>         struct sdhci_host *host = platform_get_drvdata(pdev);
>         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> @@ -502,8 +502,6 @@ static int sdhci_esdhc_mcf_remove(struct platform_device *pdev)
>         clk_disable_unprepare(mcf_data->clk_per);
>
>         sdhci_pltfm_free(pdev);
> -
> -       return 0;
>  }
>
>  static struct platform_driver sdhci_esdhc_mcf_driver = {
> @@ -512,7 +510,7 @@ static struct platform_driver sdhci_esdhc_mcf_driver = {
>                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
>         },
>         .probe = sdhci_esdhc_mcf_probe,
> -       .remove = sdhci_esdhc_mcf_remove,
> +       .remove_new = sdhci_esdhc_mcf_remove,
>  };
>
>  module_platform_driver(sdhci_esdhc_mcf_driver);
> --
> 2.39.0
>
diff mbox series

Patch

diff --git a/drivers/mmc/host/sdhci-esdhc-mcf.c b/drivers/mmc/host/sdhci-esdhc-mcf.c
index 05926bf5ecf9..a07f8333cd6b 100644
--- a/drivers/mmc/host/sdhci-esdhc-mcf.c
+++ b/drivers/mmc/host/sdhci-esdhc-mcf.c
@@ -489,7 +489,7 @@  static int sdhci_esdhc_mcf_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int sdhci_esdhc_mcf_remove(struct platform_device *pdev)
+static void sdhci_esdhc_mcf_remove(struct platform_device *pdev)
 {
 	struct sdhci_host *host = platform_get_drvdata(pdev);
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
@@ -502,8 +502,6 @@  static int sdhci_esdhc_mcf_remove(struct platform_device *pdev)
 	clk_disable_unprepare(mcf_data->clk_per);
 
 	sdhci_pltfm_free(pdev);
-
-	return 0;
 }
 
 static struct platform_driver sdhci_esdhc_mcf_driver = {
@@ -512,7 +510,7 @@  static struct platform_driver sdhci_esdhc_mcf_driver = {
 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 	},
 	.probe = sdhci_esdhc_mcf_probe,
-	.remove = sdhci_esdhc_mcf_remove,
+	.remove_new = sdhci_esdhc_mcf_remove,
 };
 
 module_platform_driver(sdhci_esdhc_mcf_driver);