[PATCH v3] mac80211: deprecate RX status noise

[Johannes Berg <johannes@sipsolutions.net>]

The noise value as is won't be used, isn't
filled by most drivers and doesn't really
make a whole lot of sense on a per packet
basis -- proper cfg80211 survey support in
mac80211 will need to be different.

Mark the struct member as deprecated so it
will be removed from drivers.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
---
I shouldn't be trying this at 9:30pm...


Currently creates the following warnings:

drivers/net/wireless/mwl8k.c:756: warning: ‘noise’ is deprecated
drivers/net/wireless/mwl8k.c:858: warning: ‘noise’ is deprecated
drivers/net/wireless/ath/ar9170/main.c:928: warning: ‘noise’ is deprecated
drivers/net/wireless/ath/ath9k/common.c:215: warning: ‘noise’ is deprecated
drivers/net/wireless/ath/ath5k/base.c:1941: warning: ‘noise’ is deprecated
drivers/net/wireless/ath/ath5k/base.c:1942: warning: ‘noise’ is deprecated
drivers/net/wireless/b43/xmit.c:613: warning: ‘noise’ is deprecated
drivers/net/wireless/b43legacy/xmit.c:551: warning: ‘noise’ is deprecated
drivers/net/wireless/libertas_tf/main.c:497: warning: ‘noise’ is deprecated
drivers/net/wireless/rt2x00/rt2x00dev.c:437: warning: ‘noise’ is deprecated
drivers/net/wireless/p54/txrx.c:353: warning: ‘noise’ is deprecated
drivers/net/wireless/wl12xx/wl1251_rx.c:80: warning: ‘noise’ is deprecated
drivers/net/wireless/wl12xx/wl1271_rx.c:139: warning: ‘noise’ is deprecated
drivers/net/wireless/iwlwifi/iwl-3945.c:682: warning: ‘noise’ is deprecated
drivers/net/wireless/iwlwifi/iwl-3945.c:685: warning: ‘noise’ is deprecated
drivers/net/wireless/iwlwifi/iwl-3945.c:689: warning: ‘noise’ is deprecated
drivers/net/wireless/iwlwifi/iwl-3945.c:697: warning: ‘noise’ is deprecated
drivers/net/wireless/iwlwifi/iwl-3945.c:711: warning: ‘noise’ is deprecated
drivers/net/wireless/iwlwifi/iwl-rx.c:1191: warning: ‘noise’ is deprecated
drivers/net/wireless/iwlwifi/iwl-rx.c:1193: warning: ‘noise’ is deprecated
drivers/net/wireless/iwlwifi/iwl-rx.c:1206: warning: ‘noise’ is deprecated

I'll make patches for drivers when it becomes
clear that it won't clash with any work others
have pending.

 include/net/mac80211.h     |    4 ++--
 net/mac80211/debugfs_sta.c |    2 --
 net/mac80211/rx.c          |    9 ---------
 net/mac80211/sta_info.h    |    2 --
 4 files changed, 2 insertions(+), 15 deletions(-)

--- wireless-testing.orig/include/net/mac80211.h	2010-02-17 20:57:33.000000000 +0100
+++ wireless-testing/include/net/mac80211.h	2010-02-17 21:25:46.000000000 +0100
@@ -543,7 +543,7 @@ enum mac80211_rx_flags {
  * @signal: signal strength when receiving this frame, either in dBm, in dB or
  *	unspecified depending on the hardware capabilities flags
  *	@IEEE80211_HW_SIGNAL_*
- * @noise: noise when receiving this frame, in dBm.
+ * @noise: noise when receiving this frame, in dBm (DEPRECATED).
  * @antenna: antenna used
  * @rate_idx: index of data rate into band's supported rates or MCS index if
  *	HT rates are use (RX_FLAG_HT)
@@ -554,7 +554,7 @@ struct ieee80211_rx_status {
 	enum ieee80211_band band;
 	int freq;
 	int signal;
-	int noise;
+	int noise __deprecated;
 	int antenna;
 	int rate_idx;
 	int flag;
--- wireless-testing.orig/net/mac80211/debugfs_sta.c	2010-02-17 21:20:49.000000000 +0100
+++ wireless-testing/net/mac80211/debugfs_sta.c	2010-02-17 21:20:53.000000000 +0100
@@ -57,7 +57,6 @@ STA_FILE(tx_filtered, tx_filtered_count,
 STA_FILE(tx_retry_failed, tx_retry_failed, LU);
 STA_FILE(tx_retry_count, tx_retry_count, LU);
 STA_FILE(last_signal, last_signal, D);
-STA_FILE(last_noise, last_noise, D);
 STA_FILE(wep_weak_iv_count, wep_weak_iv_count, LU);
 
 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
@@ -289,7 +288,6 @@ void ieee80211_sta_debugfs_add(struct st
 	DEBUGFS_ADD(tx_retry_failed);
 	DEBUGFS_ADD(tx_retry_count);
 	DEBUGFS_ADD(last_signal);
-	DEBUGFS_ADD(last_noise);
 	DEBUGFS_ADD(wep_weak_iv_count);
 	DEBUGFS_ADD(ht_capa);
 }
--- wireless-testing.orig/net/mac80211/rx.c	2010-02-17 21:20:32.000000000 +0100
+++ wireless-testing/net/mac80211/rx.c	2010-02-17 21:26:31.000000000 +0100
@@ -179,14 +179,6 @@ ieee80211_add_rx_radiotap_header(struct
 		pos++;
 	}
 
-	/* IEEE80211_RADIOTAP_DBM_ANTNOISE */
-	if (local->hw.flags & IEEE80211_HW_NOISE_DBM) {
-		*pos = status->noise;
-		rthdr->it_present |=
-			cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTNOISE);
-		pos++;
-	}
-
 	/* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */
 
 	/* IEEE80211_RADIOTAP_ANTENNA */
@@ -1078,7 +1070,6 @@ ieee80211_rx_h_sta_process(struct ieee80
 	sta->rx_fragments++;
 	sta->rx_bytes += rx->skb->len;
 	sta->last_signal = status->signal;
-	sta->last_noise = status->noise;
 
 	/*
 	 * Change STA power saving mode only at the end of a frame
--- wireless-testing.orig/net/mac80211/sta_info.h	2010-02-17 21:20:39.000000000 +0100
+++ wireless-testing/net/mac80211/sta_info.h	2010-02-17 21:20:44.000000000 +0100
@@ -200,7 +200,6 @@ struct sta_ampdu_mlme {
  * @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
- * @last_noise: noise of last received frame 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
@@ -271,7 +270,6 @@ struct sta_info {
 	unsigned long rx_fragments;
 	unsigned long rx_dropped;
 	int last_signal;
-	int last_noise;
 	__le16 last_seq_ctrl[NUM_RX_DATA_QUEUES];
 
 	/* Updated from TX status path only, no locking requirements */