kernel: fix forwarding locally generated packages in bridge isolation patch

Locally generated packets weren't forwarded to the isolated interfaces in a
bridge. Isolation should only prevent the flooding of incomming packets to
other interfaces in the bridge.

Signed-off-by: Daniel Danzberger <daniel@dd-wrt.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

target/linux/generic/hack-4.14/641-bridge_port_isolate.patch

@@ -29,7 +29,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  void br_forward(const struct net_bridge_port *to,
  		struct sk_buff *skb, bool local_rcv, bool local_orig)
  {
-+	if (to->flags & BR_ISOLATE_MODE)
++	if (to->flags & BR_ISOLATE_MODE && !local_orig)
 +		to = NULL;
 +
  	if (to && should_deliver(to, skb)) {

target/linux/generic/hack-4.9/641-bridge_port_isolate.patch

@@ -29,7 +29,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  void br_forward(const struct net_bridge_port *to,
  		struct sk_buff *skb, bool local_rcv, bool local_orig)
  {
-+	if (to->flags & BR_ISOLATE_MODE)
++	if (to->flags & BR_ISOLATE_MODE && !local_orig)
 +		to = NULL;
 +
  	if (to && should_deliver(to, skb)) {