mac80211: tweak TSQ settings

Latencies can be much higher on wifi devices, especially with
aggregation. Tune the network stack setting introduced in the previous
commit to account for that.
This commit reintroduces the previously reverted one with a fix for the
crash issues

Signed-off-by: Felix Fietkau <nbd@nbd.name>

package/kernel/mac80211/patches/140-tweak-TSQ-setting.patch

@@ -0,0 +1,15 @@
+--- a/net/mac80211/tx.c
++++ b/net/mac80211/tx.c
+@@ -3750,6 +3750,12 @@ out:
+ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
+ 				       struct net_device *dev)
+ {
++#if defined(sk_pacing_shift) || LINUX_VERSION_IS_GEQ(4,15,0)
++	if (skb->sk && sk_fullsock(skb->sk) &&
++	    skb->sk->sk_pacing_shift != 6)
++		skb->sk->sk_pacing_shift = 6;
++#endif
++
+ 	if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
+ 		struct sk_buff_head queue;
+ 

package/kernel/mac80211/patches/307-mac80211-add-hdrlen-to-ieee80211_tx_data.patch

@@ -56,7 +56,7 @@ Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
  
  	if (txq->sta)
  		tx.sta = container_of(txq->sta, struct sta_info, sta);
-@@ -3790,6 +3791,7 @@ ieee80211_build_data_template(struct iee
+@@ -3796,6 +3797,7 @@ ieee80211_build_data_template(struct iee
  	hdr = (void *)skb->data;
  	tx.sta = sta_info_get(sdata, hdr->addr1);
  	tx.skb = skb;