--- zzzz-none-000/linux-4.9.279/net/ipv4/tcp_output.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/net/ipv4/tcp_output.c	2023-02-08 11:43:43.000000000 +0000
@@ -969,6 +969,9 @@
 	skb_orphan(skb);
 	skb->sk = sk;
 	skb->destructor = skb_is_tcp_pure_ack(skb) ? __sock_wfree : tcp_wfree;
+#ifdef CONFIG_NET_SCHED
+	skb->tc_index = sk->sk_tc_index;
+#endif
 	skb_set_hash_from_sk(skb, sk);
 	atomic_add(skb->truesize, &sk->sk_wmem_alloc);
 
@@ -1244,6 +1247,10 @@
 
 	buff->ip_summed = skb->ip_summed;
 
+#ifdef CONFIG_NET_SCHED
+	skb->tc_index = sk->sk_tc_index;
+#endif
+
 	buff->tstamp = skb->tstamp;
 	tcp_fragment_tstamp(skb, buff);