From 6226783c2b4f00f38ac44dbe908e3368ac917ed9 Mon Sep 17 00:00:00 2001
From: Yan <yanzheng@21cn.com>
Date: Thu, 24 Jul 2008 12:19:32 -0400
Subject: [PATCH] --- yaml --- r: 128855 b: refs/heads/master c:
 445dceb78f3445b9bcade90e93ca35cae6120172 h: refs/heads/master i:   128853:
 43c9175e977eb149ced4e3c6183b71f74eedd95c   128851:
 d5afe997bdaac899d50b3b52e0d8cbd84a1cbd4a   128847:
 a391b040106213d21d35fd51e8e959302ee0d34f v: v3

---
 [refs]                 |  2 +-
 trunk/fs/btrfs/inode.c | 22 +++++++++-------------
 2 files changed, 10 insertions(+), 14 deletions(-)

diff --git a/[refs] b/[refs]
index 02144f506328..84dc6ef00ad1 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 974e35a82d022434efa50fe5f805ae14c542ba8c
+refs/heads/master: 445dceb78f3445b9bcade90e93ca35cae6120172
diff --git a/trunk/fs/btrfs/inode.c b/trunk/fs/btrfs/inode.c
index 8bc981c4f5ef..cf9534b79aba 100644
--- a/trunk/fs/btrfs/inode.c
+++ b/trunk/fs/btrfs/inode.c
@@ -1752,21 +1752,18 @@ static int btrfs_inode_by_name(struct inode *dir, struct dentry *dentry,
 	if (namelen == 2 && strcmp(name, "..") == 0) {
 		struct btrfs_key key;
 		struct extent_buffer *leaf;
-		u32 nritems;
 		int slot;
 
 		key.objectid = dir->i_ino;
+		key.offset = (u64)-1;
 		btrfs_set_key_type(&key, BTRFS_INODE_REF_KEY);
-		key.offset = 0;
+		if (ret < 0 || path->slots[0] == 0)
+			goto out_err;
 		ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
 		BUG_ON(ret == 0);
 		ret = 0;
-
 		leaf = path->nodes[0];
-		slot = path->slots[0];
-		nritems = btrfs_header_nritems(leaf);
-		if (slot >= nritems)
-			goto out_err;
+		slot = path->slots[0] - 1;
 
 		btrfs_item_key_to_cpu(leaf, &key, slot);
 		if (key.objectid != dir->i_ino ||
@@ -1980,16 +1977,15 @@ static int btrfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
 	/* special case for .., just use the back ref */
 	if (filp->f_pos == 1) {
 		btrfs_set_key_type(&key, BTRFS_INODE_REF_KEY);
-		key.offset = 0;
+		key.offset = (u64)-1;
 		ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
-		BUG_ON(ret == 0);
-		leaf = path->nodes[0];
-		slot = path->slots[0];
-		nritems = btrfs_header_nritems(leaf);
-		if (slot >= nritems) {
+		if (ret < 0 || path->slots[0] == 0) {
 			btrfs_release_path(root, path);
 			goto read_dir_items;
 		}
+		BUG_ON(ret == 0);
+		leaf = path->nodes[0];
+		slot = path->slots[0] - 1;
 		btrfs_item_key_to_cpu(leaf, &found_key, slot);
 		btrfs_release_path(root, path);
 		if (found_key.objectid != key.objectid ||