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perf: arm-cmn: Convert to platform remove callback returning void

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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>
Link: https://lore.kernel.org/r/8698ca612e17292f8a8bbb2d1c0f6be4b2053da7.1702648125.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Uwe Kleine-König 2023-12-15 14:59:05 +01:00 committed by Will Deacon
parent 0767f1a485
commit 3909cb3b5f
1 changed files with 2 additions and 3 deletions
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5
drivers/perf/arm-cmn.c
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@ -2504,7 +2504,7 @@ static int arm_cmn_probe(struct platform_device *pdev)
return err;
}
static int arm_cmn_remove(struct platform_device *pdev)
static void arm_cmn_remove(struct platform_device *pdev)
{
struct arm_cmn *cmn = platform_get_drvdata(pdev);
@ -2513,7 +2513,6 @@ static int arm_cmn_remove(struct platform_device *pdev)
perf_pmu_unregister(&cmn->pmu);
cpuhp_state_remove_instance_nocalls(arm_cmn_hp_state, &cmn->cpuhp_node);
debugfs_remove(cmn->debug);
return 0;
}
#ifdef CONFIG_OF
@ -2544,7 +2543,7 @@ static struct platform_driver arm_cmn_driver = {
.acpi_match_table = ACPI_PTR(arm_cmn_acpi_match),
},
.probe = arm_cmn_probe,
.remove = arm_cmn_remove,
.remove_new = arm_cmn_remove,
};
static int __init arm_cmn_init(void)