--- zzzz-none-000/linux-4.1.52/net/key/af_key.c	2018-05-28 02:26:45.000000000 +0000
+++ bcm63-7530ax-731/linux-4.1.52/net/key/af_key.c	2022-03-02 11:37:13.000000000 +0000
@@ -2771,6 +2771,10 @@
 	int err, err2;
 
 	err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, true);
+#if defined(CONFIG_BCM_KF_SPU) && (defined(CONFIG_BCM_SPU) || defined(CONFIG_BCM_SPU_MODULE))
+	if (err == 0)
+		xfrm_garbage_collect(net);
+#endif
 	err2 = unicast_flush_resp(sk, hdr);
 	if (err || err2) {
 		if (err == -ESRCH) /* empty table - old silent behavior */