If we fail to update a block group item in the loop we'll break, however
we'll do btrfs_run_delayed_refs and lose our error value in ret, and
thus not clean up properly.  Fix this by only running the delayed refs
if there was no failure.

Reviewed-by: Qu Wenruo <w...@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumsh...@wdc.com>
Signed-off-by: Josef Bacik <jo...@toxicpanda.com>
---
 fs/btrfs/block-group.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
index 69f8a306d70d..5cfa52b1a3b8 100644
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -2669,7 +2669,8 @@ int btrfs_start_dirty_block_groups(struct 
btrfs_trans_handle *trans)
         * Go through delayed refs for all the stuff we've just kicked off
         * and then loop back (just once)
         */
-       ret = btrfs_run_delayed_refs(trans, 0);
+       if (!ret)
+               ret = btrfs_run_delayed_refs(trans, 0);
        if (!ret && loops == 0) {
                loops++;
                spin_lock(&cur_trans->dirty_bgs_lock);
-- 
2.26.2

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