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bus: arm-ccn: Prevent hotplug callback leak

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commit 26242b3300 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Gleixner
2016-12-22 11:14:06 +01:00
committed by Greg Kroah-Hartman
parent bd99e7a603
commit aa1c7b01c9
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)