| Message ID | 20231008200143.196369-8-u.kleine-koenig@pengutronix.de |
|---|---|
| State | Accepted |
| Headers | show |
| Series | [01/20] mtd: rawnand: txx9ndfmc: Mark driver struct with __refdata to prevent section mismatch warning | expand |
On Sun, 2023-10-08 at 20:01:30 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/spear_smi.c b/drivers/mtd/devices/spear_smi.c index 0a35e5236ae5..1574296d47e2 100644 --- a/drivers/mtd/devices/spear_smi.c +++ b/drivers/mtd/devices/spear_smi.c @@ -1031,7 +1031,7 @@ static int spear_smi_probe(struct platform_device *pdev) * * free all allocations and delete the partitions. */ -static int spear_smi_remove(struct platform_device *pdev) +static void spear_smi_remove(struct platform_device *pdev) { struct spear_smi *dev; struct spear_snor_flash *flash; @@ -1048,8 +1048,6 @@ static int spear_smi_remove(struct platform_device *pdev) /* clean up mtd stuff */ WARN_ON(mtd_device_unregister(&flash->mtd)); } - - return 0; } #ifdef CONFIG_PM_SLEEP @@ -1095,7 +1093,7 @@ static struct platform_driver spear_smi_driver = { .pm = &spear_smi_pm_ops, }, .probe = spear_smi_probe, - .remove = spear_smi_remove, + .remove_new = spear_smi_remove, }; module_platform_driver(spear_smi_driver);
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/spear_smi.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)