package/kernel/mac80211/patches/subsys/315-mac80211-check-and-refresh-aggregation-session-in-en.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Mon, 17 Aug 2020 21:11:25 +0200
   3 Subject: [PATCH] mac80211: check and refresh aggregation session in
   4  encap offload tx
   5
   6 Update the last_tx timestamp to avoid tearing down the aggregation session
   7 early. Fall back to the slow path if the session setup is still running
   8
   9 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  10 ---
  11
  12 --- a/net/mac80211/tx.c
  13 +++ b/net/mac80211/tx.c
  14 @@ -4189,6 +4189,8 @@ static void ieee80211_8023_xmit(struct i
  15         bool authorized = false;
  16         bool multicast;
  17         unsigned char *ra = ehdr->h_dest;
  18 +       struct tid_ampdu_tx *tid_tx;
  19 +       u8 tid;
  20
  21         if (IS_ERR(sta) || (sta && !sta->uploaded))
  22                 sta = NULL;
  23 @@ -4226,6 +4228,22 @@ static void ieee80211_8023_xmit(struct i
  24
  25         memset(info, 0, sizeof(*info));
  26
  27 +       if (sta) {
  28 +               tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
  29 +               tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
  30 +               if (tid_tx) {
  31 +                       if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
  32 +                               /* fall back to non-offload slow path */
  33 +                               __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
  34 +                               return;
  35 +                       }
  36 +
  37 +                       info->flags |= IEEE80211_TX_CTL_AMPDU;
  38 +                       if (tid_tx->timeout)
  39 +                               tid_tx->last_tx = jiffies;
  40 +               }
  41 +       }
  42 +
  43         if (unlikely(!multicast && skb->sk &&
  44                      skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS))
  45                 info->ack_frame_id = ieee80211_store_ack_skb(local, skb,