mac80211: remove STA infos last_ack stuff

These things aren't used and the only possible use is within
rate control algorithms, however those can, if they need it,
keep track of it in their private data. last_ack_ms isn't
even updated so completely useless.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 0 insertions, 3 deletions

diff --git a/net/mac80211/rc80211_pid_algo.c b/net/mac80211/rc80211_pid_algo.c
index da8462bbd5f4..9762803e4876 100644
--- a/net/mac80211/rc80211_pid_algo.c
+++ b/net/mac80211/rc80211_pid_algo.c
@@ -280,9 +280,6 @@ static void rate_control_pid_tx_status(void *priv, struct net_device *dev,
                 sta->tx_num_consecutive_failures++;
                 sta->tx_num_mpdu_fail++;
         } else {
-                sta->last_ack_rssi[0] = sta->last_ack_rssi[1];
-                sta->last_ack_rssi[1] = sta->last_ack_rssi[2];
-                sta->last_ack_rssi[2] = status->ack_signal;
                 sta->tx_num_consecutive_failures = 0;
                 sta->tx_num_mpdu_ok++;
         }