4.9-stable review patch. If anyone has any objections, please let me know.
------------------ From: Thomas Gleixner <t...@linutronix.de> commit 26242b330093fd14c2e94fb6cbdf0f482ab26576 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: fdc15a36d84e ("bus/arm-ccn: Convert to hotplug statemachine") Signed-off-by: Thomas Gleixner <t...@linutronix.de> Cc: Sebastian Andrzej Siewior <bige...@linutronix.de> Cc: Mark Rutland <mark.rutl...@arm.com> Cc: Pawel Moll <pawel.m...@arm.com> Cc: Suzuki K Poulose <suzuki.poul...@arm.com> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Will Deacon <will.dea...@arm.com> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- drivers/bus/arm-ccn.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/bus/arm-ccn.c +++ b/drivers/bus/arm-ccn.c @@ -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)