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md/raid5: Cleanup cpu hotplug notifier

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The raid456_cpu_notify() hotplug callback lacks handling of the
CPU_UP_CANCELED case. That means if CPU_UP_PREPARE fails, the scratch
buffer is leaked.

Add handling for CPU_UP_CANCELED[_FROZEN] hotplug notifier transitions
to free the scratch buffer.

CC: Shaohua Li <shli@kernel.org>
CC: linux-raid@vger.kernel.org
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Signed-off-by: Shaohua Li <shli@fb.com>
This commit is contained in:
Anna-Maria Gleixner 2016-03-16 09:25:23 +01:00 committed by Shaohua Li
parent 23ddba80eb
commit 1d034e68e2
1 changed files with 2 additions and 0 deletions
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2
drivers/md/raid5.c
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@ -6381,6 +6381,8 @@ static int raid456_cpu_notify(struct notifier_block *nfb, unsigned long action,
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
case CPU_UP_CANCELED:
case CPU_UP_CANCELED_FROZEN:
free_scratch_buffer(conf, per_cpu_ptr(conf->percpu, cpu));
break;
default: