[RFC Patch net-next 3/6] net_sched: return NULL in tcf_hash_check()

[Cong Wang]

When we don't find an action with a specific index,
we only return false but not touch *a. It is nicer
if we could set *a to NULL here, this would make
callers easier to use these API's.

Cc: Jamal Hadi Salim <j...@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangc...@gmail.com>
---
 net/sched/act_api.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index db907e5..d0a7db2 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -230,6 +230,7 @@ bool tcf_hash_check(struct tc_action_net *tn, u32 index, 
struct tc_action **a,
                *a = p;
                return true;
        }
+       *a = NULL;
        return false;
 }
 EXPORT_SYMBOL(tcf_hash_check);
-- 
2.1.0