--- zzzz-none-000/linux-5.4.213/net/bridge/br_forward.c	2022-09-15 10:04:56.000000000 +0000
+++ alder-5690pro-762/linux-5.4.213/net/bridge/br_forward.c	2024-08-14 09:02:13.000000000 +0000
@@ -17,6 +17,8 @@
 #include <linux/netfilter_bridge.h>
 #include "br_private.h"
 
+#include <avm/pa/avm_pa.h>
+
 /* Don't forward packets to originating port or forwarding disabled */
 static inline int should_deliver(const struct net_bridge_port *p,
 				 const struct sk_buff *skb)
@@ -24,10 +26,40 @@
 	struct net_bridge_vlan_group *vg;
 
 	vg = nbp_vlan_group_rcu(p);
+
+	/* QCA introduces some weird hairpin handling code here. We do not need
+	 * that as we perfrom that configuration from userspace. So just use the
+	 * code from the vanilla upstream kernel. For more details see MR
+	 * linux!2159 or JZ-123646. */
+#ifdef CONFIG_AVM_ENHANCED
 	return ((p->flags & BR_HAIRPIN_MODE) || skb->dev != p->dev) &&
 		br_allowed_egress(vg, skb) && p->state == BR_STATE_FORWARDING &&
 		nbp_switchdev_allowed_egress(p, skb) &&
 		!br_skb_isolated(p, skb);
+#else
+	if ((skb->dev != p->dev) &&
+	    br_allowed_egress(vg, skb) && p->state == BR_STATE_FORWARDING &&
+	    nbp_switchdev_allowed_egress(p, skb) &&
+	    !br_skb_isolated(p, skb)) {
+		return true;
+	}
+
+	if ((skb->dev == p->dev) &&
+	    (p->flags & BR_HAIRPIN_MODE) &&
+	    br_allowed_egress(vg, skb) && p->state == BR_STATE_FORWARDING) {
+
+		/* Allow hairpin only on WLAN netdevices.
+		 * For ethernet interfaces, hairpin not allowed
+		 * due to issue with switchdevs. */
+		if ( skb->dev->ieee80211_ptr == NULL) {
+			return false;
+		}
+
+		return true;
+	}
+
+	return false;
+#endif
 }
 
 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb)
@@ -62,7 +94,7 @@
 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
 {
 	skb->tstamp = 0;
-	return NF_HOOK(NFPROTO_BRIDGE, NF_BR_POST_ROUTING,
+	return BR_HOOK(NFPROTO_BRIDGE, NF_BR_POST_ROUTING,
 		       net, sk, skb, NULL, skb->dev,
 		       br_dev_queue_push_xmit);
 
@@ -106,7 +138,7 @@
 		indev = NULL;
 	}
 
-	NF_HOOK(NFPROTO_BRIDGE, br_hook,
+	BR_HOOK(NFPROTO_BRIDGE, br_hook,
 		net, NULL, skb, indev, skb->dev,
 		br_forward_finish);
 }
@@ -194,6 +226,8 @@
 	struct net_bridge_port *prev = NULL;
 	struct net_bridge_port *p;
 
+	avm_pa_do_not_accelerate(skb);
+
 	list_for_each_entry_rcu(p, &br->port_list, list) {
 		/* Do not flood unicast traffic to ports that turn it off, nor
 		 * other traffic if flood off, except for traffic we originate