diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 2c2d2e5..007db89 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -670,7 +670,7 @@
 	spin_unlock_irqrestore(&info->io_lock, flags);
 
 	/* Flush gnttab callback work. Must be done with no locks held. */
-	flush_work_sync(&info->work);
+	flush_work(&info->work);
 
 	del_gendisk(info->gd);
 
@@ -719,7 +719,7 @@
 	spin_unlock_irq(&info->io_lock);
 
 	/* Flush gnttab callback work. Must be done with no locks held. */
-	flush_work_sync(&info->work);
+	flush_work(&info->work);
 
 	/* Free resources associated with old device channel. */
 	if (info->ring_ref != GRANT_INVALID_REF) {