Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Need to take mutex in ath9k_add_interface(), from Dan Carpenter.

 2) Fix mt76 build without CONFIG_LEDS_CLASS, from Arnd Bergmann.

 3) Fix socket wmem accounting in SCTP, from Xin Long.

 4) Fix failed resume crash in ena driver, from Arthur Kiyanovski.

 5) qed driver passes bytes instead of bits into second arg of
    bitmap_weight(). From Denis Bolotin.

 6) Fix reset deadlock in ibmvnic, from Juliet Kim.

 7) skb_scrube_packet() needs to scrub the fwd marks too, from Petr
    Machata.

 8) Make sure older TCP stacks see enough dup ACKs, and avoid doing SACK
    compression during this period, from Eric Dumazet.

 9) Add atomicity to SMC protocol cursor handling, from Ursula Braun.

10) Don't leave dangling error pointer if bpf_prog_add() fails in
    thunderx driver, from Lorenzo Bianconi. Also, when we unmap TSO
    headers, set sq->tso_hdrs to NULL.

11) Fix race condition over state variables in act_police, from Davide
    Caratti.

12) Disable guest csum in the presence of XDP in virtio_net, from Jason
    Wang.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (64 commits)
  net: gemini: Fix copy/paste error
  net: phy: mscc: fix deadlock in vsc85xx_default_config
  dt-bindings: dsa: Fix typo in "probed"
  net: thunderx: set tso_hdrs pointer to NULL in nicvf_free_snd_queue
  net: amd: add missing of_node_put()
  team: no need to do team_notify_peers or team_mcast_rejoin when disabling port
  virtio-net: fail XDP set if guest csum is negotiated
  virtio-net: disable guest csum during XDP set
  net/sched: act_police: add missing spinlock initialization
  net: don't keep lonely packets forever in the gro hash
  net/ipv6: re-do dad when interface has IFF_NOARP flag change
  packet: copy user buffers before orphan or clone
  ibmvnic: Update driver queues after change in ring size support
  ibmvnic: Fix RX queue buffer cleanup
  net: thunderx: set xdp_prog to NULL if bpf_prog_add fails
  net/dim: Update DIM start sample after each DIM iteration
  net: faraday: ftmac100: remove netif_running(netdev) check before disabling interrupts
  net/smc: use after free fix in smc_wr_tx_put_slot()
  net/smc: atomic SMCD cursor handling
  net/smc: add SMC-D shutdown signal
  ...

1 files changed, 13 insertions, 2 deletions

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 2868ef28ce52..1e37c1388189 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -4268,7 +4268,7 @@ static void tcp_sack_new_ofo_skb(struct sock *sk, u32 seq, u32 end_seq)
          * If the sack array is full, forget about the last one.
          */
         if (this_sack >= TCP_NUM_SACKS) {
-                if (tp->compressed_ack)
+                if (tp->compressed_ack > TCP_FASTRETRANS_THRESH)
                         tcp_send_ack(sk);
                 this_sack--;
                 tp->rx_opt.num_sacks--;
@@ -4363,6 +4363,7 @@ static bool tcp_try_coalesce(struct sock *sk,
         if (TCP_SKB_CB(from)->has_rxtstamp) {
                 TCP_SKB_CB(to)->has_rxtstamp = true;
                 to->tstamp = from->tstamp;
+                skb_hwtstamps(to)->hwtstamp = skb_hwtstamps(from)->hwtstamp;
         }
 
         return true;
@@ -5188,7 +5189,17 @@ send_now:
         if (!tcp_is_sack(tp) ||
             tp->compressed_ack >= sock_net(sk)->ipv4.sysctl_tcp_comp_sack_nr)
                 goto send_now;
-        tp->compressed_ack++;
+
+        if (tp->compressed_ack_rcv_nxt != tp->rcv_nxt) {
+                tp->compressed_ack_rcv_nxt = tp->rcv_nxt;
+                if (tp->compressed_ack > TCP_FASTRETRANS_THRESH)
+                        NET_ADD_STATS(sock_net(sk), LINUX_MIB_TCPACKCOMPRESSED,
+                                      tp->compressed_ack - TCP_FASTRETRANS_THRESH);
+                tp->compressed_ack = 0;
+        }
+
+        if (++tp->compressed_ack <= TCP_FASTRETRANS_THRESH)
+                goto send_now;
 
         if (hrtimer_is_queued(&tp->compressed_ack_timer))
                 return;