bcachefs: avoid returning private error code in bch2_xattr_bcachefs_set

Avoid the private error code return to caller. The error code
should be transformed into genernal error code.
Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/xattr.c

@@ -544,11 +544,11 @@ static int bch2_xattr_bcachefs_set(const struct xattr_handler *handler,
 		kfree(buf);
 
 		if (ret < 0)
-			return ret;
+			goto err_class_exit;
 
 		ret = bch2_opt_check_may_set(c, opt_id, v);
 		if (ret < 0)
-			return ret;
+			goto err_class_exit;
 
 		s.v = v + 1;
 		s.defined = true;
@@ -595,6 +595,7 @@ static int bch2_xattr_bcachefs_set(const struct xattr_handler *handler,
 	     (opt_id == Opt_compression && !inode_opt_get(c, &inode->ei_inode, background_compression))))
 		bch2_set_rebalance_needs_scan(c, inode->ei_inode.bi_inum);
 
+err_class_exit:
 	return bch2_err_class(ret);
 }