zygo: fixup btrfs: do not resolve backrefs for roots that are being deleted

(cherry picked from commit 2e219d3245d453c3fb8d9ae990b5725bfc7daf40)

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index a1bd7e63d29dcf822e06d695e6367f853b0b6f71..7546d7d8bf2d95ed62fe3128a4eb30cffc7e7e7c 100644 (file)
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -562,6 +562,7 @@ static int resolve_indirect_ref(struct btrfs_fs_info *fs_info,
 
        if (!path->search_commit_root &&
            test_bit(BTRFS_ROOT_DELETING, &root->state)) {
+               srcu_read_unlock(&fs_info->subvol_srcu, index);
                ret = -ENOENT;
                goto out;
        }