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perf: arm_smmuv3: 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/23bfd1a73ce819ffce6137c237608684a3cdfda6.1702648125.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 14:59:09 +01:00 committed by Will Deacon
parent 02d77ac1ac
commit d67c3a61f0
1 changed files with 2 additions and 4 deletions
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6
drivers/perf/arm_smmuv3_pmu.c
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@ -965,14 +965,12 @@ out_unregister:
return err;
}
static int smmu_pmu_remove(struct platform_device *pdev)
static void smmu_pmu_remove(struct platform_device *pdev)
{
struct smmu_pmu *smmu_pmu = platform_get_drvdata(pdev);
perf_pmu_unregister(&smmu_pmu->pmu);
cpuhp_state_remove_instance_nocalls(cpuhp_state_num, &smmu_pmu->node);
return 0;
}
static void smmu_pmu_shutdown(struct platform_device *pdev)
@ -997,7 +995,7 @@ static struct platform_driver smmu_pmu_driver = {
.suppress_bind_attrs = true,
},
.probe = smmu_pmu_probe,
.remove = smmu_pmu_remove,
.remove_new = smmu_pmu_remove,
.shutdown = smmu_pmu_shutdown,
};