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btrfs: find_and_setup_root error push-up

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find_and_setup_root BUGs when it encounters an error from
btrfs_find_last_root, which can occur if a path can't be allocated.

This patch pushes it up to its callers where it is already handled.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
This commit is contained in:
Jeff Mahoney 2011-10-03 23:22:43 -04:00 committed by David Sterba
parent 6763af84a6
commit 200a5c1767
1 changed files with 6 additions and 5 deletions
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11
fs/btrfs/disk-io.c
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@ -1197,10 +1197,10 @@ static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
return 0;
}
static int find_and_setup_root(struct btrfs_root *tree_root,
struct btrfs_fs_info *fs_info,
u64 objectid,
struct btrfs_root *root)
static int __must_check find_and_setup_root(struct btrfs_root *tree_root,
struct btrfs_fs_info *fs_info,
u64 objectid,
struct btrfs_root *root)
{
int ret;
u32 blocksize;
@ -1213,7 +1213,8 @@ static int find_and_setup_root(struct btrfs_root *tree_root,
&root->root_item, &root->root_key);
if (ret > 0)
return -ENOENT;
BUG_ON(ret);
else if (ret < 0)
return ret;
generation = btrfs_root_generation(&root->root_item);
blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));