[v3,10/16] drm/imx: lcdc: Convert to platform remove callback returning void

Commit Message

Uwe Kleine-König Nov. 2, 2023, 4:56 p.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 ignored (apart
from emitting a warning) 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. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <[e-mail]>
---
 drivers/gpu/drm/imx/lcdc/imx-lcdc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Patch

diff --git a/drivers/gpu/drm/imx/lcdc/imx-lcdc.c b/drivers/gpu/drm/imx/lcdc/imx-lcdc.c
index 22b65f4a0e30..0902983374d0 100644
--- a/drivers/gpu/drm/imx/lcdc/imx-lcdc.c
+++ b/drivers/gpu/drm/imx/lcdc/imx-lcdc.c
@@ -515,14 +515,12 @@  static int imx_lcdc_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int imx_lcdc_remove(struct platform_device *pdev)
+static void imx_lcdc_remove(struct platform_device *pdev)
 {
 	struct drm_device *drm = platform_get_drvdata(pdev);
 
 	drm_dev_unregister(drm);
 	drm_atomic_helper_shutdown(drm);
-
-	return 0;
 }
 
 static void imx_lcdc_shutdown(struct platform_device *pdev)
@@ -536,7 +534,7 @@  static struct platform_driver imx_lcdc_driver = {
 		.of_match_table = imx_lcdc_of_dev_id,
 	},
 	.probe = imx_lcdc_probe,
-	.remove = imx_lcdc_remove,
+	.remove_new = imx_lcdc_remove,
 	.shutdown = imx_lcdc_shutdown,
 };
 module_platform_driver(imx_lcdc_driver);