--- zzzz-none-000/linux-5.15.111/net/ipv4/tcp_output.c	2023-05-11 14:00:40.000000000 +0000
+++ puma7-atom-6670-761/linux-5.15.111/net/ipv4/tcp_output.c	2024-02-07 10:23:30.000000000 +0000
@@ -1317,6 +1317,9 @@
 	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
 	refcount_add(skb->truesize, &sk->sk_wmem_alloc);
 
 	skb_set_dst_pending_confirm(skb, sk->sk_dst_pending_confirm);
@@ -1592,6 +1595,10 @@
 
 	buff->ip_summed = CHECKSUM_PARTIAL;
 
+#ifdef CONFIG_NET_SCHED
+	skb->tc_index = sk->sk_tc_index;
+#endif
+
 	buff->tstamp = skb->tstamp;
 	tcp_fragment_tstamp(skb, buff);