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 <[e-mail]>
Signed-off-by: Kent Overstreet <[e-mail]>

fs/bcachefs/xattr.c

···
 		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;
···
 	     (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);
 }