| Message ID | 20231008200143.196369-7-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | Handled Elsewhere, archived |
| Headers | show |
| Series | mtd: Convert to platform remove callback returning void | expand |
On Sun, 2023-10-08 at 20:01:29 UTC, =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= 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> Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git mtd/next, thanks. Miquel
diff --git a/drivers/mtd/devices/powernv_flash.c b/drivers/mtd/devices/powernv_flash.c index 36e060386e59..66044f4f5bad 100644 --- a/drivers/mtd/devices/powernv_flash.c +++ b/drivers/mtd/devices/powernv_flash.c @@ -265,14 +265,12 @@ static int powernv_flash_probe(struct platform_device *pdev) * * Returns 0 */ -static int powernv_flash_release(struct platform_device *pdev) +static void powernv_flash_release(struct platform_device *pdev) { struct powernv_flash *data = dev_get_drvdata(&(pdev->dev)); /* All resources should be freed automatically */ WARN_ON(mtd_device_unregister(&data->mtd)); - - return 0; } static const struct of_device_id powernv_flash_match[] = { @@ -285,7 +283,7 @@ static struct platform_driver powernv_flash_driver = { .name = "powernv_flash", .of_match_table = powernv_flash_match, }, - .remove = powernv_flash_release, + .remove_new = powernv_flash_release, .probe = powernv_flash_probe, };
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/mtd/devices/powernv_flash.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)