package/kernel/mac80211/patches/subsys/800-mac80211-mask-nested-A-MSDU-support-for-mesh.patch

   1 From 313d8c18385f10957402b475f9b0c209ceab6c5a Mon Sep 17 00:00:00 2001
   2 From: David Bauer <mail@david-bauer.net>
   3 Date: Fri, 8 Oct 2021 00:25:19 +0200
   4 Subject: [PATCH] mac80211: mask nested A-MSDU support for mesh
   5
   6 mac80211 incorrectly processes A-MSDUs contained in A-MPDU frames. This
   7 results in dropped packets and severely impacted throughput.
   8
   9 As a workaround, don't indicate support for A-MSDUs contained in
  10 A-MPDUs. This improves throughput over mesh links by factor 10.
  11
  12 Ref: https://github.com/openwrt/mt76/issues/450
  13
  14 Signed-off-by: David Bauer <mail@david-bauer.net>
  15 ---
  16  net/mac80211/agg-rx.c | 4 +++-
  17  1 file changed, 3 insertions(+), 1 deletion(-)
  18
  19 --- a/net/mac80211/agg-rx.c
  20 +++ b/net/mac80211/agg-rx.c
  21 @@ -251,7 +251,11 @@ static void ieee80211_send_addba_resp(st
  22         mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
  23         mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
  24
  25 -       capab = u16_encode_bits(amsdu, IEEE80211_ADDBA_PARAM_AMSDU_MASK);
  26 +       capab = 0;
  27 +#ifdef CPTCFG_MAC80211_MESH
  28 +       if (!sta->mesh)
  29 +#endif
  30 +               capab = u16_encode_bits(amsdu, IEEE80211_ADDBA_PARAM_AMSDU_MASK);
  31         capab |= u16_encode_bits(policy, IEEE80211_ADDBA_PARAM_POLICY_MASK);
  32         capab |= u16_encode_bits(tid, IEEE80211_ADDBA_PARAM_TID_MASK);
  33         capab |= u16_encode_bits(buf_size, IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK);