Revert "nl80211/mac80211: Report signal average"

This reverts commit 86107fd1.

This patch inadvertantly changed the userland ABI.
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

include/linux/nl80211.h

@@ -1161,7 +1161,6 @@ enum nl80211_rate_info {
  * @__NL80211_STA_INFO_AFTER_LAST: internal
  * @NL80211_STA_INFO_MAX: highest possible station info attribute
  * @NL80211_STA_INFO_SIGNAL: signal strength of last received PPDU (u8, dBm)
- * @NL80211_STA_INFO_SIGNAL_AVG: signal strength average (u8, dBm)
  * @NL80211_STA_INFO_TX_BITRATE: current unicast tx rate, nested attribute
  * 	containing info as possible, see &enum nl80211_sta_info_txrate.
  * @NL80211_STA_INFO_RX_PACKETS: total received packet (u32, from this station)
@@ -1179,7 +1178,6 @@ enum nl80211_sta_info {
 	NL80211_STA_INFO_PLID,
 	NL80211_STA_INFO_PLINK_STATE,
 	NL80211_STA_INFO_SIGNAL,
-	NL80211_STA_INFO_SIGNAL_AVG,
 	NL80211_STA_INFO_TX_BITRATE,
 	NL80211_STA_INFO_RX_PACKETS,
 	NL80211_STA_INFO_TX_PACKETS,

include/net/cfg80211.h

@@ -424,7 +424,6 @@ struct station_parameters {
  * @STATION_INFO_TX_RETRIES: @tx_retries filled
  * @STATION_INFO_TX_FAILED: @tx_failed filled
  * @STATION_INFO_RX_DROP_MISC: @rx_dropped_misc filled
- * @STATION_INFO_SIGNAL_AVG: @signal_avg filled
  */
 enum station_info_flags {
 	STATION_INFO_INACTIVE_TIME	= 1<<0,
@@ -440,7 +439,6 @@ enum station_info_flags {
 	STATION_INFO_TX_RETRIES		= 1<<10,
 	STATION_INFO_TX_FAILED		= 1<<11,
 	STATION_INFO_RX_DROP_MISC	= 1<<12,
-	STATION_INFO_SIGNAL_AVG		= 1<<13,
 };
 
 /**
@@ -487,7 +485,6 @@ struct rate_info {
  * @plid: mesh peer link id
  * @plink_state: mesh peer link state
  * @signal: signal strength of last received packet in dBm
- * @signal_avg: signal strength average in dBm
  * @txrate: current unicast bitrate to this station
  * @rx_packets: packets received from this station
  * @tx_packets: packets transmitted to this station
@@ -508,7 +505,6 @@ struct station_info {
 	u16 plid;
 	u8 plink_state;
 	s8 signal;
-	s8 signal_avg;
 	struct rate_info txrate;
 	u32 rx_packets;
 	u32 tx_packets;

net/mac80211/Kconfig

@@ -6,7 +6,6 @@ config MAC80211
 	select CRYPTO_ARC4
 	select CRYPTO_AES
 	select CRC32
-	select AVERAGE
 	---help---
 	  This option enables the hardware independent IEEE 802.11
 	  networking stack.

net/mac80211/cfg.c

@@ -343,9 +343,8 @@ static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
 
 	if ((sta->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) ||
 	    (sta->local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)) {
-		sinfo->filled |= STATION_INFO_SIGNAL | STATION_INFO_SIGNAL_AVG;
+		sinfo->filled |= STATION_INFO_SIGNAL;
 		sinfo->signal = (s8)sta->last_signal;
-		sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal);
 	}
 
 	sinfo->txrate.flags = 0;

net/mac80211/rx.c

@@ -1156,7 +1156,6 @@ ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
 	sta->rx_fragments++;
 	sta->rx_bytes += rx->skb->len;
 	sta->last_signal = status->signal;
-	ewma_add(&sta->avg_signal, -status->signal);
 
 	/*
 	 * Change STA power saving mode only at the end of a frame

net/mac80211/sta_info.c

@@ -244,8 +244,6 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
 	sta->local = local;
 	sta->sdata = sdata;
 
-	ewma_init(&sta->avg_signal, 1000, 8);
-
 	if (sta_prepare_rate_control(local, sta, gfp)) {
 		kfree(sta);
 		return NULL;

net/mac80211/sta_info.h

@@ -13,7 +13,6 @@
 #include <linux/types.h>
 #include <linux/if_ether.h>
 #include <linux/workqueue.h>
-#include <linux/average.h>
 #include "key.h"
 
 /**
@@ -225,7 +224,6 @@ enum plink_state {
  * @rx_fragments: number of received MPDUs
  * @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_seq_ctrl: last received seq/frag number from this STA (per RX queue)
  * @tx_filtered_count: number of frames the hardware filtered for this STA
  * @tx_retry_failed: number of frames that failed retry
@@ -293,7 +291,6 @@ struct sta_info {
 	unsigned long rx_fragments;
 	unsigned long rx_dropped;
 	int last_signal;
-	struct ewma avg_signal;
 	__le16 last_seq_ctrl[NUM_RX_DATA_QUEUES];
 
 	/* Updated from TX status path only, no locking requirements */

net/wireless/nl80211.c

@@ -1872,9 +1872,6 @@ static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
 	if (sinfo->filled & STATION_INFO_SIGNAL)
 		NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
 			   sinfo->signal);
-	if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
-		NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
-			   sinfo->signal_avg);
 	if (sinfo->filled & STATION_INFO_TX_BITRATE) {
 		txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
 		if (!txrate)