[PATCH 1/1] netfilter: Use IS_ERR_OR_NULL instead of IS_ERR and NULl check to simplify the codes in ip_vs_genl_dump_dests and resolve_normal_ct

[fgao]

From: Gao Feng <f...@ikuai8.com>

Signed-off-by: Gao Feng <f...@ikuai8.com>
---
 v1: Initial Version

 net/netfilter/ipvs/ip_vs_ctl.c    | 2 +-
 net/netfilter/nf_conntrack_core.c | 6 ++----
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index c3c809b..6dc86cc 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -3267,7 +3267,7 @@ static int ip_vs_genl_dump_dests(struct sk_buff *skb,
 
 
        svc = ip_vs_genl_find_service(ipvs, attrs[IPVS_CMD_ATTR_SERVICE]);
-       if (IS_ERR(svc) || svc == NULL)
+       if (IS_ERR_OR_NULL(svc))
                goto out_err;
 
        /* Dump the destinations */
diff --git a/net/netfilter/nf_conntrack_core.c 
b/net/netfilter/nf_conntrack_core.c
index 153e33f..634d592 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -1108,10 +1108,8 @@ resolve_normal_ct(struct net *net, struct nf_conn *tmpl,
        if (!h) {
                h = init_conntrack(net, tmpl, &tuple, l3proto, l4proto,
                                   skb, dataoff, hash);
-               if (!h)
-                       return NULL;
-               if (IS_ERR(h))
-                       return (void *)h;
+               if (IS_ERR_OR_NULL(h))
+                       return ERR_CAST(h);
        }
        ct = nf_ct_tuplehash_to_ctrack(h);
 
-- 
1.9.1