From: Josef Bacik <jbacik@fusionio.com>
Date: Tue, 5 Nov 2013 16:11:40 +0000 (-0500)
Subject: Btrfs: don't BUG_ON() if we get an error walking backrefs
X-Git-Tag: firefly_0821_release~176^2~4789^2~25
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4724b106b9b8e8b802ca6f6d8a2f74feb8a3c375;p=firefly-linux-kernel-4.4.55.git

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 da8d2f696ac5..fd67b34e220d 100644
--- 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) {