From: Baowen Zheng <baowen.zheng@corigine.com>
Date: Mon, 13 Dec 2021 15:46:04 +0100
Subject: flow_offload: return EOPNOTSUPP for the unsupported mpls action type
Patch-mainline: v5.16-rc6
Git-commit: 166b6a46b78bf8b9559a6620c3032f9fe492e082
References: git-fixes

We need to return EOPNOTSUPP for the unsupported mpls action type when
setup the flow action.

In the original implement, we will return 0 for the unsupported mpls
action type, actually we do not setup it and the following actions
to the flow action entry.

Fixes: 9838b20a7fb2 ("net: sched: take rtnl lock in tc_setup_flow_action()")
Signed-off-by: Baowen Zheng <baowen.zheng@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 net/sched/cls_api.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -3702,6 +3702,7 @@ int tc_setup_flow_action(struct flow_act
 				entry->mpls_mangle.ttl = tcf_mpls_ttl(act);
 				break;
 			default:
+				err = -EOPNOTSUPP;
 				goto err_out_locked;
 			}
 		} else if (is_tcf_skbedit_ptype(act)) {