btrfs: find_and_setup_root error push-up
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>
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index d52ec11..155c4e3 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1197,10 +1197,10 @@
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 @@
&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));