--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -1321,6 +1321,9 @@ int gfs2_quota_sync(struct super_block *sb, int type)
 					qda[x]->qd_sync_gen =
 						sdp->sd_quota_sync_gen;
 
+			if (!sdp->sd_quota_bitmap)
+				break;
+
 			for (x = 0; x < num_qd; x++)
 				qd_unlock(qda[x]);
 		}