flow_dissector: Use same pointer for IPv4 and IPv6 addresses

The IPv6 parsing was using a local pointer when it could use the same
pointer as the IPv4 portion of the code since the key_addrs can support
both IPv4 and IPv6 as it is just a pointer.
Signed-off-by: Alexander Duyck <aduyck@mirantis.com>
Acked-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/flow_dissector.c

@@ -220,13 +220,12 @@ bool __skb_flow_dissect(const struct sk_buff *skb,
 
 		if (dissector_uses_key(flow_dissector,
 				       FLOW_DISSECTOR_KEY_IPV6_ADDRS)) {
-			struct flow_dissector_key_ipv6_addrs *key_ipv6_addrs;
-
-			key_ipv6_addrs = skb_flow_dissector_target(flow_dissector,
-								   FLOW_DISSECTOR_KEY_IPV6_ADDRS,
-								   target_container);
+			key_addrs = skb_flow_dissector_target(flow_dissector,
+							      FLOW_DISSECTOR_KEY_IPV6_ADDRS,
+							      target_container);
 
-			memcpy(key_ipv6_addrs, &iph->saddr, sizeof(*key_ipv6_addrs));
+			memcpy(&key_addrs->v6addrs, &iph->saddr,
+			       sizeof(key_addrs->v6addrs));
 			key_control->addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 		}