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authorMiao Xie <miaox@cn.fujitsu.com>2012-12-05 10:56:13 +0000
committerChris Mason <chris.mason@fusionio.com>2012-12-16 20:46:20 -0500
commitac6a2b36f9fcfbe4865550afb6d333dec6b57578 (patch)
tree7e6212618664d645a5954ddcd8de58267e0f916c /fs/btrfs
parent7426cc04d407621773af3a0403e57642e40c36bf (diff)
Btrfs: fix wrong return value of btrfs_truncate_page()
ret variant may be set to 0 if we read page successfully, but it might be released before we lock it again. On this case, if we fail to allocate a new page, we will return 0, it is wrong, fix it. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/inode.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index bf609581c5d..0446cbe8bca 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3521,11 +3521,11 @@ int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
if (ret)
goto out;
- ret = -ENOMEM;
again:
page = find_or_create_page(mapping, index, mask);
if (!page) {
btrfs_delalloc_release_space(inode, PAGE_CACHE_SIZE);
+ ret = -ENOMEM;
goto out;
}
@@ -3574,7 +3574,6 @@ again:
goto out_unlock;
}
- ret = 0;
if (offset != PAGE_CACHE_SIZE) {
if (!len)
len = PAGE_CACHE_SIZE - offset;