Btrfs: EIO when we fail to read tree roots

[mv-sheeva.git] / fs / btrfs / disk-io.c

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index b803c2667673c8ef598aef3ed597f8884348cb0e..a5d2249e6da5b9d6ef4f52a691578bf18b060713 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1007,7 +1007,10 @@ static int find_and_setup_root(struct btrfs_root *tree_root,
        blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));
        root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
                                     blocksize, generation);
-       BUG_ON(!root->node);
+       if (!root->node || !btrfs_buffer_uptodate(root->node, generation)) {
+               free_extent_buffer(root->node);
+               return -EIO;
+       }
        root->commit_root = btrfs_root_node(root);
        return 0;
 }