iwlagn: remove write-only variables

Updating the variables last_rx_rssi, last_tsf
and last_beacon_time needs a lot of code but
they are not actually used in iwlagn (only in
3945) so we can move them to the 3945 specific
data.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>

6 files changed, 15 insertions, 42 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-3945-rs.c b/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
index effdd3670da4..b588cb69536a 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
@@ -946,7 +946,7 @@ void iwl3945_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id)
 
         spin_unlock_irqrestore(&rs_sta->lock, flags);
 
-        rssi = priv->last_rx_rssi;
+        rssi = priv->_3945.last_rx_rssi;
         if (rssi == 0)
                 rssi = IWL_MIN_RSSI_VAL;
 
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
index 867bd69270f8..9a5a7b100e6b 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.c
@@ -705,9 +705,10 @@ static void iwl3945_rx_reply_rx(struct iwl_priv *priv,
         iwl_dbg_log_rx_data_frame(priv, le16_to_cpu(rx_hdr->len), header);
 
         if (network_packet) {
-                priv->last_beacon_time = le32_to_cpu(rx_end->beacon_timestamp);
-                priv->last_tsf = le64_to_cpu(rx_end->timestamp);
-                priv->last_rx_rssi = rx_status.signal;
+                priv->_3945.last_beacon_time =
+                        le32_to_cpu(rx_end->beacon_timestamp);
+                priv->_3945.last_tsf = le64_to_cpu(rx_end->timestamp);
+                priv->_3945.last_rx_rssi = rx_status.signal;
                 priv->last_rx_noise = rx_status.noise;
         }
 
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
index 8bf7c20b9d39..696e668b801d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
@@ -2956,12 +2956,8 @@ static ssize_t rs_sta_dbgfs_rate_scale_data_read(struct file *file,
                 desc += sprintf(buff+desc,
                                 "Bit Rate= %d Mb/s\n",
                                 iwl_rates[lq_sta->last_txrate_idx].ieee >> 1);
-        desc += sprintf(buff+desc,
-                        "Signal Level= %d dBm\tNoise Level= %d dBm\n",
-                        priv->last_rx_rssi, priv->last_rx_noise);
-        desc += sprintf(buff+desc,
-                        "Tsf= 0x%llx\tBeacon time= 0x%08X\n",
-                        priv->last_tsf, priv->last_beacon_time);
+        desc += sprintf(buff+desc, "Noise Level= %d dBm\n",
+                        priv->last_rx_noise);
 
         ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
         return ret;
diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index f9210b78ffc1..c277e4e8cf87 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -1197,7 +1197,6 @@ struct iwl_priv {
 
         unsigned long status;
 
-        int last_rx_rssi;       /* From Rx packet statistics */
         int last_rx_noise;      /* From beacon statistics */
 
         /* counts mgmt, ctl, and data packets */
@@ -1244,10 +1243,6 @@ struct iwl_priv {
 
         u8 mac80211_registered;
 
-        /* Rx'd packet timing information */
-        u32 last_beacon_time;
-        u64 last_tsf;
-
         /* eeprom -- this is in the card's little endian byte order */
         u8 *eeprom;
         int    nvm_device_type;
@@ -1274,6 +1269,11 @@ struct iwl_priv {
                         struct iwl3945_notif_statistics statistics;
 
                         u32 sta_supp_rates;
+                        int last_rx_rssi;       /* From Rx packet statistics */
+
+                        /* Rx'd packet timing information */
+                        u32 last_beacon_time;
+                        u64 last_tsf;
                 } _3945;
 #endif
 #if defined(CONFIG_IWLAGN) || defined(CONFIG_IWLAGN_MODULE)
diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c
index df257bc15f49..8116aa0d7678 100644
--- a/drivers/net/wireless/iwlwifi/iwl-rx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-rx.c
@@ -1036,24 +1036,6 @@ static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv,
         rxb->page = NULL;
 }
 
-/* This is necessary only for a number of statistics, see the caller. */
-static int iwl_is_network_packet(struct iwl_priv *priv,
-                struct ieee80211_hdr *header)
-{
-        /* Filter incoming packets to determine if they are targeted toward
-         * this network, discarding packets coming from ourselves */
-        switch (priv->iw_mode) {
-        case NL80211_IFTYPE_ADHOC: /* Header: Dest. | Source    | BSSID */
-                /* packets to our IBSS update information */
-                return !compare_ether_addr(header->addr3, priv->bssid);
-        case NL80211_IFTYPE_STATION: /* Header: Dest. | AP{BSSID} | Source */
-                /* packets to our IBSS update information */
-                return !compare_ether_addr(header->addr2, priv->bssid);
-        default:
-                return 1;
-        }
-}
-
 /* Called for REPLY_RX (legacy ABG frames), or
  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
 void iwl_rx_reply_rx(struct iwl_priv *priv,
@@ -1190,12 +1172,6 @@ void iwl_rx_reply_rx(struct iwl_priv *priv,
         if (rate_n_flags & RATE_MCS_SGI_MSK)
                 rx_status.flag |= RX_FLAG_SHORT_GI;
 
-        if (iwl_is_network_packet(priv, header)) {
-                priv->last_rx_rssi = rx_status.signal;
-                priv->last_beacon_time =  priv->ucode_beacon_time;
-                priv->last_tsf = le64_to_cpu(phy_res->timestamp);
-        }
-
         iwl_pass_packet_to_mac80211(priv, header, len, ampdu_status,
                                     rxb, &rx_status);
 }
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index 1b3a1ba4ed96..a825092fff90 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -753,7 +753,7 @@ static int iwl3945_get_measurement(struct iwl_priv *priv,
         if (iwl_is_associated(priv))
                 add_time =
                     iwl3945_usecs_to_beacons(
-                        le64_to_cpu(params->start_time) - priv->last_tsf,
+                        le64_to_cpu(params->start_time) - priv->_3945.last_tsf,
                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 
         memset(&spectrum, 0, sizeof(spectrum));
@@ -767,7 +767,7 @@ static int iwl3945_get_measurement(struct iwl_priv *priv,
 
         if (iwl_is_associated(priv))
                 spectrum.start_time =
-                    iwl3945_add_beacon_time(priv->last_beacon_time,
+                    iwl3945_add_beacon_time(priv->_3945.last_beacon_time,
                                 add_time,
                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
         else
@@ -3590,7 +3590,7 @@ static ssize_t store_measurement(struct device *d,
         struct iwl_priv *priv = dev_get_drvdata(d);
         struct ieee80211_measurement_params params = {
                 .channel = le16_to_cpu(priv->active_rxon.channel),
-                .start_time = cpu_to_le64(priv->last_tsf),
+                .start_time = cpu_to_le64(priv->_3945.last_tsf),
                 .duration = cpu_to_le16(1),
         };
         u8 type = IWL_MEASURE_BASIC;