mac80211: remove sta->last_ack_signal

This file only feeds a debugfs file that isn't very useful, so remove
it. If necessary, we can add other ways to get this information, for
example in the NL80211_CMD_PROBE_CLIENT response.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

3 files changed, 0 insertions, 7 deletions

diff --git a/net/mac80211/debugfs_sta.c b/net/mac80211/debugfs_sta.c
index 06d52935036d..1200b6a581d2 100644
--- a/net/mac80211/debugfs_sta.c
+++ b/net/mac80211/debugfs_sta.c
@@ -50,7 +50,6 @@ static const struct file_operations sta_ ##name## _ops = {		\
                 STA_OPS(name)
 
 STA_FILE(aid, sta.aid, D);
-STA_FILE(last_ack_signal, last_ack_signal, D);
 
 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
                               size_t count, loff_t *ppos)
@@ -366,7 +365,6 @@ void ieee80211_sta_debugfs_add(struct sta_info *sta)
         DEBUGFS_ADD(agg_status);
         DEBUGFS_ADD(ht_capa);
         DEBUGFS_ADD(vht_capa);
-        DEBUGFS_ADD(last_ack_signal);
 
         DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
         DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index ce4271406692..7bb5781b4ce2 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -373,7 +373,6 @@ DECLARE_EWMA(signal, 1024, 8)
  * @rx_dropped: number of dropped MPDUs from this STA
  * @last_signal: signal of last received frame from this STA
  * @avg_signal: moving average of signal of received frames from this STA
- * @last_ack_signal: signal of last received Ack frame from this STA
  * @last_seq_ctrl: last received seq/frag number from this STA (per TID
  *      plus one for non-QoS frames)
  * @tx_filtered_count: number of frames the hardware filtered for this STA
@@ -467,7 +466,6 @@ struct sta_info {
         unsigned long rx_dropped;
         int last_signal;
         struct ewma_signal avg_signal;
-        int last_ack_signal;
 
         u8 chains;
         s8 chain_signal_last[IEEE80211_MAX_CHAINS];
diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index 98fd04c4b2a0..da67b84905a8 100644
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -863,9 +863,6 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
                                 ieee80211_lost_packet(sta, info);
                         }
                 }
-
-                if (acked)
-                        sta->last_ack_signal = info->status.ack_signal;
         }
 
         rcu_read_unlock();