package/kernel/mac80211/patches/ath/561-ath9k-dynack-set-ackto-to-max-timeout-in-ath_dynack_.patch

   1 From cc783bfa67e87d2e6206f7626b7bbb74d5c5f269 Mon Sep 17 00:00:00 2001
   2 From: Lorenzo Bianconi <lorenzo@kernel.org>
   3 Date: Tue, 20 Aug 2019 18:20:22 +0200
   4 Subject: [PATCH 4/4] ath9k: dynack: set ackto to max timeout in
   5  ath_dynack_reset
   6
   7 Initialize acktimeout to the maximum configurable value in
   8 ath_dynack_reset in order to not disconnect long distance static links
   9 enabling dynack and even to take care of possible errors configuring
  10 a static timeout. Moreover initialize station timeout value to the current
  11 acktimeout value
  12
  13 Tested-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
  14 Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
  15 ---
  16  drivers/net/wireless/ath/ath9k/dynack.c | 20 +++++++++++++-------
  17  1 file changed, 13 insertions(+), 7 deletions(-)
  18
  19 --- a/drivers/net/wireless/ath/ath9k/dynack.c
  20 +++ b/drivers/net/wireless/ath/ath9k/dynack.c
  21 @@ -321,11 +321,9 @@ EXPORT_SYMBOL(ath_dynack_sample_ack_ts);
  22   */
  23  void ath_dynack_node_init(struct ath_hw *ah, struct ath_node *an)
  24  {
  25 -       /* ackto = slottime + sifs + air delay */
  26 -       u32 ackto = 9 + 16 + 64;
  27         struct ath_dynack *da = &ah->dynack;
  28
  29 -       an->ackto = ackto;
  30 +       an->ackto = da->ackto;
  31
  32         spin_lock_bh(&da->qlock);
  33         list_add_tail(&an->list, &da->nodes);
  34 @@ -356,20 +354,26 @@ EXPORT_SYMBOL(ath_dynack_node_deinit);
  35   */
  36  void ath_dynack_reset(struct ath_hw *ah)
  37  {
  38 -       /* ackto = slottime + sifs + air delay */
  39 -       u32 ackto = 9 + 16 + 64;
  40         struct ath_dynack *da = &ah->dynack;
  41 +       struct ath_node *an;
  42 +
  43 +       spin_lock_bh(&da->qlock);
  44
  45         da->lto = jiffies + COMPUTE_TO;
  46 -       da->ackto = ackto;
  47
  48         da->st_rbf.t_rb = 0;
  49         da->st_rbf.h_rb = 0;
  50         da->ack_rbf.t_rb = 0;
  51         da->ack_rbf.h_rb = 0;
  52
  53 +       da->ackto = ath_dynack_get_max_to(ah);
  54 +       list_for_each_entry(an, &da->nodes, list)
  55 +               an->ackto = da->ackto;
  56 +
  57         /* init acktimeout */
  58 -       ath_dynack_set_timeout(ah, ackto);
  59 +       ath_dynack_set_timeout(ah, da->ackto);
  60 +
  61 +       spin_unlock_bh(&da->qlock);
  62  }
  63  EXPORT_SYMBOL(ath_dynack_reset);
  64
  65 @@ -386,6 +390,8 @@ void ath_dynack_init(struct ath_hw *ah)
  66
  67         spin_lock_init(&da->qlock);
  68         INIT_LIST_HEAD(&da->nodes);
  69 +       /* ackto = slottime + sifs + air delay */
  70 +       da->ackto = 9 + 16 + 64;
  71
  72         ah->hw->wiphy->features |= NL80211_FEATURE_ACKTO_ESTIMATION;
  73  }