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bus: arm-ccn: Prevent hotplug callback leak 

In case the driver registration fails, the hotplug callback is leaked.

Not fatal, because it's never invoked as there are no instances registered,
but wrong nevertheless.

Fixes: fdc15a36d8 ("bus/arm-ccn: Convert to hotplug statemachine")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
hifive-unleashed-5.1
Thomas Gleixner 2016-12-22 11:14:06 +01:00
parent 834fcd2980
commit 26242b3300
1 changed files with 4 additions and 1 deletions
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5
drivers/bus/arm-ccn.c
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@ -1570,7 +1570,10 @@ static int __init arm_ccn_init(void)
for (i = 0; i < ARRAY_SIZE(arm_ccn_pmu_events); i++)
arm_ccn_pmu_events_attrs[i] = &arm_ccn_pmu_events[i].attr.attr;
return platform_driver_register(&arm_ccn_driver);
ret = platform_driver_register(&arm_ccn_driver);
if (ret)
cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_CCN_ONLINE);
return ret;
}
static void __exit arm_ccn_exit(void)