--- x/fs/xfs/xfs_qm.c
+++ y/fs/xfs/xfs_qm.c
@@ -461,12 +461,7 @@ xfs_qm_dquot_isolate(
 		/* we have to drop the LRU lock to flush the dquot */
 		spin_unlock(lru_lock);
 
-		error = xfs_qm_dqflush(dqp, &bp);
-		if (error)
-			goto out_unlock_dirty;
-
-		xfs_buf_delwri_queue(bp, &isol->buffers);
-		xfs_buf_relse(bp);
+		xfs_qm_dqflush(dqp, &bp);
 		goto out_unlock_dirty;
 	}
 	xfs_dqfunlock(dqp);