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-rw-r--r--block/blk-mq.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index eac444804736..9d53f476c517 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2748,6 +2748,10 @@ static void __blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set,
list_for_each_entry(q, &set->tag_list, tag_set_list)
blk_mq_unfreeze_queue(q);
+ /*
+ * Sync with blk_mq_queue_tag_busy_iter.
+ */
+ synchronize_rcu();
}
void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_queues)