diff mbox series

[2/2] fb: amifb: Convert to platform remove callback returning void

Message ID 20231109220151.10654-3-u.kleine-koenig@pengutronix.de
State New
Headers show
Series [1/2] fb: amifb: Mark driver struct with __refdata to prevent section mismatch warning | expand

Commit Message

Uwe Kleine-König Nov. 9, 2023, 10:01 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 <u.kleine-koenig@pengutronix.de>
---
 drivers/video/fbdev/amifb.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

Comments

Geert Uytterhoeven Nov. 10, 2023, 7:59 a.m. UTC | #1
On Thu, Nov 9, 2023 at 11:02 PM Uwe Kleine-König
<u.kleine-koenig@pengutronix.de> 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 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 <u.kleine-koenig@pengutronix.de>

Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>

Gr{oetje,eeting}s,

                        Geert
diff mbox series

Patch

diff --git a/drivers/video/fbdev/amifb.c b/drivers/video/fbdev/amifb.c
index 4a1bc693cebd..305f396c764c 100644
--- a/drivers/video/fbdev/amifb.c
+++ b/drivers/video/fbdev/amifb.c
@@ -3752,7 +3752,7 @@  static int __init amifb_probe(struct platform_device *pdev)
 }
 
 
-static int __exit amifb_remove(struct platform_device *pdev)
+static void __exit amifb_remove(struct platform_device *pdev)
 {
 	struct fb_info *info = platform_get_drvdata(pdev);
 
@@ -3765,7 +3765,6 @@  static int __exit amifb_remove(struct platform_device *pdev)
 	chipfree();
 	framebuffer_release(info);
 	amifb_video_off();
-	return 0;
 }
 
 /*
@@ -3775,7 +3774,7 @@  static int __exit amifb_remove(struct platform_device *pdev)
  * triggers a section mismatch warning.
  */
 static struct platform_driver amifb_driver __refdata = {
-	.remove = __exit_p(amifb_remove),
+	.remove_new = __exit_p(amifb_remove),
 	.driver   = {
 		.name	= "amiga-video",
 	},