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   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Sat, 16 Mar 2019 18:01:53 +0100
   3 Subject: [PATCH] mac80211: set NETIF_F_LLTX when using intermediate tx
   4  queues
   5
   6 When using iTXQ, tx sequence number allocation and statistics are run at
   7 dequeue time. Because of that, it is safe to enable NETIF_F_LLTX, which
   8 allows tx handlers to run on multiple CPUs in parallel.
   9
  10 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  11 ---
  12
  13 --- a/net/mac80211/iface.c
  14 +++ b/net/mac80211/iface.c
  15 @@ -1301,6 +1301,7 @@ static void ieee80211_if_setup(struct ne
  16  static void ieee80211_if_setup_no_queue(struct net_device *dev)
  17  {
  18         ieee80211_if_setup(dev);
  19 +       dev->features |= NETIF_F_LLTX;
  20  #if LINUX_VERSION_IS_GEQ(4,3,0)
  21         dev->priv_flags |= IFF_NO_QUEUE;
  22  #else