--- zzzz-none-000/linux-2.6.39.4/net/bridge/br_sysfs_if.c	2011-08-03 19:43:28.000000000 +0000
+++ puma6-arm-6490-729/linux-2.6.39.4/net/bridge/br_sysfs_if.c	2021-11-10 13:23:11.000000000 +0000
@@ -20,6 +20,10 @@
 
 #include "br_private.h"
 
+#if IS_ENABLED(CONFIG_AVM_PA)
+#include <avm/pa/avm_pa.h>
+#endif
+
 struct brport_attribute {
 	struct attribute	attr;
 	ssize_t (*show)(struct net_bridge_port *, char *);
@@ -159,6 +163,33 @@
 static BRPORT_ATTR(hairpin_mode, S_IRUGO | S_IWUSR,
 		   show_hairpin_mode, store_hairpin_mode);
 
+static ssize_t show_isolated_mode(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "%d\n", (p->flags & BR_ISOLATED) != 0);
+}
+static ssize_t store_isolated_mode(struct net_bridge_port *p, unsigned long v)
+{
+	if (v)
+		p->flags |= BR_ISOLATED;
+	else
+		p->flags &= ~BR_ISOLATED;
+
+#if IS_ENABLED(CONFIG_AVM_PA)
+	{
+		struct avm_pa_dev_info *devinfo = AVM_PA_DEVINFO(p->dev);
+
+		if (devinfo->pid_handle)
+			avm_pa_flush_sessions_for_pid(devinfo->pid_handle);
+		if (devinfo->vpid_handle)
+			avm_pa_flush_sessions_for_vpid(devinfo->vpid_handle);
+	}
+#endif
+
+	return 0;
+}
+static BRPORT_ATTR(isolated, S_IRUGO | S_IWUSR,
+		   show_isolated_mode, store_isolated_mode);
+
 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf)
 {
@@ -194,6 +225,7 @@
 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 	&brport_attr_multicast_router,
 #endif
+	&brport_attr_isolated,
 	NULL
 };