Btrfs: don't BUG_ON() if we get an error walking backrefs

We can just return false for this so we stop doing the snapshot aware defrag
stuff.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index da8d2f696ac5c461154046e985dcd8dfc5c22b29..fd67b34e220d271c5e570b4960540468b92c029b 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2129,7 +2129,8 @@ static noinline bool record_extent_backrefs(struct btrfs_path *path,
                                                  old->extent_offset, fs_info,
                                                  path, record_one_backref,
                                                  old);
-               BUG_ON(ret < 0 && ret != -ENOENT);
+               if (ret < 0 && ret != -ENOENT)
+                       return false;
 
                /* no backref to be processed for this extent */
                if (!old->count) {