Btrfs: add missing error check in incremental send

Function wait_for_parent_move() returns negative value if an error
happened, 0 if we don't need to wait for the parent's move, and
1 if the wait is needed.
Before this change an error return value was being treated like the
return value 1, which was not correct.

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 9dde9717c1b9..70272e1d2b1e 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -3227,7 +3227,10 @@ verbose_printk("btrfs: process_recorded_refs %llu\n", sctx->cur_ino);
                                  * dirs, we always have one new and one deleted
                                  * ref. The deleted ref is ignored later.
                                  */
-                                if (wait_for_parent_move(sctx, cur)) {
+                                ret = wait_for_parent_move(sctx, cur);
+                                if (ret < 0)
+                                        goto out;
+                                if (ret) {
                                         ret = add_pending_dir_move(sctx,
                                                                    cur->dir);
                                         *pending_move = 1;