net: sched: fix error return code in tcf_del_walker()

When nla_put_u32() fails, 'ret' could be 0, it should
return error code in tcf_del_walker().

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index f6d5755d669eba66a40b44088b362c8ae6f8d934..d17a66aab8eead6074a5aa49df3c94892abffa17 100644 (file)
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -381,7 +381,8 @@ static int tcf_del_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb,
        }
        mutex_unlock(&idrinfo->lock);
 
-       if (nla_put_u32(skb, TCA_FCNT, n_i))
+       ret = nla_put_u32(skb, TCA_FCNT, n_i);
+       if (ret)
                goto nla_put_failure;
        nla_nest_end(skb, nest);