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blk-cgroup: ensure that we clear the stop bit on quiesced queues

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If we call blk_mq_quiesce_queue() on a queue, we must remember to
pair that with something that clears the stopped by on the
queues later on.

Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Jens Axboe 2017-01-18 07:43:26 -07:00
parent d348499138
commit 4d199c6f1c
1 changed files with 6 additions and 4 deletions
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10
block/blk-cgroup.c
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@ -1265,9 +1265,10 @@ int blkcg_activate_policy(struct request_queue *q,
spin_unlock_irq(q->queue_lock); spin_unlock_irq(q->queue_lock);
out_bypass_end: out_bypass_end:
if (q->mq_ops) if (q->mq_ops) {
blk_mq_unfreeze_queue(q); blk_mq_unfreeze_queue(q);
else blk_mq_start_stopped_hw_queues(q, true);
} else
blk_queue_bypass_end(q); blk_queue_bypass_end(q);
if (pd_prealloc) if (pd_prealloc)
pol->pd_free_fn(pd_prealloc); pol->pd_free_fn(pd_prealloc);
@ -1317,9 +1318,10 @@ void blkcg_deactivate_policy(struct request_queue *q,
spin_unlock_irq(q->queue_lock); spin_unlock_irq(q->queue_lock);
if (q->mq_ops) if (q->mq_ops) {
blk_mq_unfreeze_queue(q); blk_mq_unfreeze_queue(q);
else blk_mq_start_stopped_hw_queues(q, true);
} else
blk_queue_bypass_end(q); blk_queue_bypass_end(q);
} }
EXPORT_SYMBOL_GPL(blkcg_deactivate_policy); EXPORT_SYMBOL_GPL(blkcg_deactivate_policy);