netfilter: conntrack: Convert to use ERR_CAST()

Use the ERR_CAST macro to clearly indicate that this is a pointer
to an error value and that a type conversion was performed.

Signed-off-by: Shen Lichuan <shenlichuan@vivo.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 9384426..d3cb53b 100644 (file)
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -1722,7 +1722,7 @@ init_conntrack(struct net *net, struct nf_conn *tmpl,
        ct = __nf_conntrack_alloc(net, zone, tuple, &repl_tuple, GFP_ATOMIC,
                                  hash);
        if (IS_ERR(ct))
-               return (struct nf_conntrack_tuple_hash *)ct;
+               return ERR_CAST(ct);
 
        if (!nf_ct_add_synproxy(ct, tmpl)) {
                nf_conntrack_free(ct);