From: Liu Bo <bo.li.liu@oracle.com>
Date: Wed, 22 May 2013 12:07:06 +0000 (+0000)
Subject: Btrfs: check if leaf's parent exists before pushing items around
X-Git-Tag: v3.11-rc1~70^2~45
X-Git-Url: http://git.cascardo.eti.br/?a=commitdiff_plain;h=33157e05dbd60c3edd30b56d4dfc7755cae787c5;p=cascardo%2Flinux.git

Btrfs: check if leaf's parent exists before pushing items around

During splitting a leaf, pushing items around to hopefully get some space only
works when we have a parent, ie. we have at least one sibling leaf.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 0a430f7c5afd..1c9dc71089ce 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -3986,7 +3986,7 @@ static noinline int split_leaf(struct btrfs_trans_handle *trans,
 		return -EOVERFLOW;
 
 	/* first try to make some room by pushing left and right */
-	if (data_size) {
+	if (data_size && path->nodes[1]) {
 		wret = push_leaf_right(trans, root, path, data_size,
 				       data_size, 0, 0);
 		if (wret < 0)