Commit 97a32864 authored Sep 23, 2016 by Sebastian Andrzej Siewior Committed by Jens Axboe Sep 23, 2016

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: 65d5291e ("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>

parent 65d5291e

block/blk-mq.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}