diff --git a/[refs] b/[refs]
index 50e803f2ea23..c136a4d521af 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 86b6c7a7f78feca58d2d8615e53aee4d59ab9dc6
+refs/heads/master: 84e9e03c55c2456799ab19f1d577e72f721fdd39
diff --git a/trunk/block/blk-map.c b/trunk/block/blk-map.c
index 955d75c1a58f..bc5ce60691c3 100644
--- a/trunk/block/blk-map.c
+++ b/trunk/block/blk-map.c
@@ -143,6 +143,7 @@ int blk_rq_map_user(struct request_queue *q, struct request *rq,
 	return 0;
 unmap_rq:
 	blk_rq_unmap_user(bio);
+	rq->bio = NULL;
 	return ret;
 }
 EXPORT_SYMBOL(blk_rq_map_user);