1 files changed, 5 insertions, 3 deletions

diff --git a/block/blk-core.c b/block/blk-core.c
index b754a4a2f9b..1b7dddf94f4 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -253,9 +253,11 @@ EXPORT_SYMBOL(__generic_unplug_device);
  **/
 void generic_unplug_device(struct request_queue *q)
 {
-        spin_lock_irq(q->queue_lock);
-        __generic_unplug_device(q);
-        spin_unlock_irq(q->queue_lock);
+        if (blk_queue_plugged(q)) {
+                spin_lock_irq(q->queue_lock);
+                __generic_unplug_device(q);
+                spin_unlock_irq(q->queue_lock);
+        }
 }
 EXPORT_SYMBOL(generic_unplug_device);