Btrfs: do not BUG_ON in prepare_to_reloc
We can bail out from here gracefully instead of a cold BUG_ON.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 7d1654c..9d13786 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -3731,7 +3731,15 @@
set_reloc_control(rc);
trans = btrfs_join_transaction(rc->extent_root);
- BUG_ON(IS_ERR(trans));
+ if (IS_ERR(trans)) {
+ unset_reloc_control(rc);
+ /*
+ * extent tree is not a ref_cow tree and has no reloc_root to
+ * cleanup. And callers are responsible to free the above
+ * block rsv.
+ */
+ return PTR_ERR(trans);
+ }
btrfs_commit_transaction(trans, rc->extent_root);
return 0;
}
