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-rw-r--r--block/blk-ioc.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/block/blk-ioc.c b/block/blk-ioc.c
index 27a06e0..7490b6d 100644
--- a/block/blk-ioc.c
+++ b/block/blk-ioc.c
@@ -204,7 +204,9 @@ void put_io_context(struct io_context *ioc, struct request_queue *locked_q)
spin_unlock(last_q->queue_lock);
last_q = NULL;
- if (!spin_trylock(this_q->queue_lock))
+ /* spin_trylock() always successes in UP case */
+ if (this_q != locked_q &&
+ !spin_trylock(this_q->queue_lock))
break;
last_q = this_q;
continue;
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