[PATCH 4/4] ath9k: dynack: set ackto to max timeout in ath_dynack_reset

[Lorenzo Bianconi]

Initialize acktimeout to the maximum configurable value in
ath_dynack_reset in order to not disconnect long distance static links
enabling dynack and even to take care of possible errors configuring
a static timeout. Moreover initialize station timeout value to the current
acktimeout value

Tested-by: Koen Vandeputte <koen.vandepu...@ncentric.com>
Signed-off-by: Lorenzo Bianconi <lore...@kernel.org>
---
 drivers/net/wireless/ath/ath9k/dynack.c | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/dynack.c 
b/drivers/net/wireless/ath/ath9k/dynack.c
index f5acaa577d62..fbeb4a739d32 100644
--- a/drivers/net/wireless/ath/ath9k/dynack.c
+++ b/drivers/net/wireless/ath/ath9k/dynack.c
@@ -321,11 +321,9 @@ EXPORT_SYMBOL(ath_dynack_sample_ack_ts);
  */
 void ath_dynack_node_init(struct ath_hw *ah, struct ath_node *an)
 {
-       /* ackto = slottime + sifs + air delay */
-       u32 ackto = 9 + 16 + 64;
        struct ath_dynack *da = &ah->dynack;
 
-       an->ackto = ackto;
+       an->ackto = da->ackto;
 
        spin_lock_bh(&da->qlock);
        list_add_tail(&an->list, &da->nodes);
@@ -356,20 +354,26 @@ EXPORT_SYMBOL(ath_dynack_node_deinit);
  */
 void ath_dynack_reset(struct ath_hw *ah)
 {
-       /* ackto = slottime + sifs + air delay */
-       u32 ackto = 9 + 16 + 64;
        struct ath_dynack *da = &ah->dynack;
+       struct ath_node *an;
+
+       spin_lock_bh(&da->qlock);
 
        da->lto = jiffies + COMPUTE_TO;
-       da->ackto = ackto;
 
        da->st_rbf.t_rb = 0;
        da->st_rbf.h_rb = 0;
        da->ack_rbf.t_rb = 0;
        da->ack_rbf.h_rb = 0;
 
+       da->ackto = ath_dynack_get_max_to(ah);
+       list_for_each_entry(an, &da->nodes, list)
+               an->ackto = da->ackto;
+
        /* init acktimeout */
-       ath_dynack_set_timeout(ah, ackto);
+       ath_dynack_set_timeout(ah, da->ackto);
+
+       spin_unlock_bh(&da->qlock);
 }
 EXPORT_SYMBOL(ath_dynack_reset);
 
@@ -386,6 +390,8 @@ void ath_dynack_init(struct ath_hw *ah)
 
        spin_lock_init(&da->qlock);
        INIT_LIST_HEAD(&da->nodes);
+       /* ackto = slottime + sifs + air delay */
+       da->ackto = 9 + 16 + 64;
 
        ah->hw->wiphy->features |= NL80211_FEATURE_ACKTO_ESTIMATION;
 }
-- 
2.21.0