package/kernel/mac80211/patches/322-mac80211-don-t-handle-filtered-frames-within-a-BA-se.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Wed, 22 Feb 2017 16:13:17 +0100
   3 Subject: [PATCH] mac80211: don't handle filtered frames within a BA session
   4
   5 When running a BA session, the driver (or the hardware) already takes
   6 care of retransmitting failed frames, since it has to keep the receiver
   7 reorder window in sync.
   8
   9 Adding another layer of retransmit around that does not improve
  10 anything. In fact, it can only lead to some strong reordering with huge
  11 latency.
  12
  13 Cc: stable@vger.kernel.org
  14 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  15 ---
  16
  17 --- a/net/mac80211/status.c
  18 +++ b/net/mac80211/status.c
  19 @@ -51,7 +51,8 @@ static void ieee80211_handle_filtered_fr
  20         struct ieee80211_hdr *hdr = (void *)skb->data;
  21         int ac;
  22
  23 -       if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
  24 +       if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER |
  25 +                          IEEE80211_TX_CTL_AMPDU)) {
  26                 ieee80211_free_txskb(&local->hw, skb);
  27                 return;
  28         }