From: Changman Lee <cm224.lee@samsung.com>
Date: Tue, 19 Feb 2013 22:47:06 +0000 (+0900)
Subject: f2fs: check the level before calling get_nid function
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=52c2db3f95ff8e8d9650885d6d66b8258ded1e38;p=openwrt%2Fstaging%2Fblogic.git

f2fs: check the level before calling get_nid function

The caller of get_nid should be careful not to put lower value than
NODE_DIR1_BLOCK in case of level is zero.

Signed-off-by: Changman Lee <cm224.lee@samsung.com>
Reviewed-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
---

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 65ec2eabb392..d408e69294c8 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -403,7 +403,8 @@ int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode)
 		return PTR_ERR(npage[0]);
 
 	parent = npage[0];
-	nids[1] = get_nid(parent, offset[0], true);
+	if (level != 0)
+		nids[1] = get_nid(parent, offset[0], true);
 	dn->inode_page = npage[0];
 	dn->inode_page_locked = true;