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blk-mq: fixup "Convert to new hotplug state machine" 

The "blk_mq_queue_reinit_dead()" just cleared the cpumask instead doing
a copy. Since we might never had an online callback we could end up with
a ZERO mask which in turn leads to crash as test robot demonstarted.

Fixes: 65d5291eee ("blk-mq: Convert to new hotplug state machine")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Sebastian Andrzej Siewior 2016-09-23 15:02:38 +02:00 committed by Jens Axboe
parent 65d5291eee
commit 97a32864e6
1 changed files with 1 additions and 1 deletions
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2
block/blk-mq.c
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@ -2158,7 +2158,7 @@ static void blk_mq_queue_reinit_work(void)
static int blk_mq_queue_reinit_dead(unsigned int cpu)
{
cpumask_clear_cpu(cpu, &cpuhp_online_new);
cpumask_copy(&cpuhp_online_new, cpu_online_mask);
blk_mq_queue_reinit_work();
return 0;
}