diff mbox series

[57/58] mmc: renesas_sdhi: Convert to platform remove callback returning void

Message ID 20230713080807.69999-57-frank.li@vivo.com
State New
Headers
Series [01/58] mmc: sunxi: Convert to platform remove callback returning void |

Commit Message

李扬韬 July 13, 2023, 8:08 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/mmc/host/renesas_sdhi.h               | 2 +-
 drivers/mmc/host/renesas_sdhi_core.c          | 4 +---
 drivers/mmc/host/renesas_sdhi_internal_dmac.c | 2 +-
 drivers/mmc/host/renesas_sdhi_sys_dmac.c      | 2 +-
 4 files changed, 4 insertions(+), 6 deletions(-)

Comments

Geert Uytterhoeven July 13, 2023, 10:18 a.m. UTC | #1 
On Thu, Jul 13, 2023 at 10:32 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
diff mbox series

Patch

diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h
index 68da3da9e2e5..c1fb9740eab0 100644
--- a/drivers/mmc/host/renesas_sdhi.h
+++ b/drivers/mmc/host/renesas_sdhi.h
@@ -101,5 +101,5 @@  int renesas_sdhi_probe(struct platform_device *pdev,
 		       const struct tmio_mmc_dma_ops *dma_ops,
 		       const struct renesas_sdhi_of_data *of_data,
 		       const struct renesas_sdhi_quirks *quirks);
-int renesas_sdhi_remove(struct platform_device *pdev);
+void renesas_sdhi_remove(struct platform_device *pdev);
 #endif
diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c
index 345934e4f59e..5d3adef144d7 100644
--- a/drivers/mmc/host/renesas_sdhi_core.c
+++ b/drivers/mmc/host/renesas_sdhi_core.c
@@ -1145,15 +1145,13 @@  int renesas_sdhi_probe(struct platform_device *pdev,
 }
 EXPORT_SYMBOL_GPL(renesas_sdhi_probe);
 
-int renesas_sdhi_remove(struct platform_device *pdev)
+void renesas_sdhi_remove(struct platform_device *pdev)
 {
 	struct tmio_mmc_host *host = platform_get_drvdata(pdev);
 
 	tmio_mmc_host_remove(host);
 	renesas_sdhi_clk_disable(host);
 	tmio_mmc_host_free(host);
-
-	return 0;
 }
 EXPORT_SYMBOL_GPL(renesas_sdhi_remove);
 
diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
index 9ab813903b2c..d8efb8035b1f 100644
--- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
@@ -609,7 +609,7 @@  static struct platform_driver renesas_internal_dmac_sdhi_driver = {
 		.of_match_table = renesas_sdhi_internal_dmac_of_match,
 	},
 	.probe		= renesas_sdhi_internal_dmac_probe,
-	.remove		= renesas_sdhi_remove,
+	.remove_new	= renesas_sdhi_remove,
 };
 
 module_platform_driver(renesas_internal_dmac_sdhi_driver);
diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
index b559ad38b667..248dfeef942a 100644
--- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
@@ -470,7 +470,7 @@  static struct platform_driver renesas_sys_dmac_sdhi_driver = {
 		.of_match_table = renesas_sdhi_sys_dmac_of_match,
 	},
 	.probe		= renesas_sdhi_sys_dmac_probe,
-	.remove		= renesas_sdhi_remove,
+	.remove_new	= renesas_sdhi_remove,
 };
 
 module_platform_driver(renesas_sys_dmac_sdhi_driver);