rt2x00: Remove ieee80211_rx_status from rt2x00_dev

rt2x00 was keeping a copy of ieee80211_rx_status embedded
into the rt2x00_dev structure. For each RX frame, this structure
was copied into the skb->cb where mac80211 would handle it further.

However at the moment only the fields current band, and frequency
were updated. Whereas the band was already provided directly within
the rt2x00_dev structure. Save a memcpy action, and reduce memory
a bit, by adding a curr_freq field to rt2x00_dev, and completely
remove the ieee80211_rx_status structure from rt2x00_dev.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2800lib.c

@@ -494,7 +494,7 @@ static int rt2800_agc_to_rssi(struct rt2x00_dev *rt2x00dev, int rxwi_w2)
 	u8 offset1;
 	u8 offset2;
 
-	if (rt2x00dev->rx_status.band == IEEE80211_BAND_2GHZ) {
+	if (rt2x00dev->curr_band == IEEE80211_BAND_2GHZ) {
 		rt2x00_eeprom_read(rt2x00dev, EEPROM_RSSI_BG, &eeprom);
 		offset0 = rt2x00_get_field16(eeprom, EEPROM_RSSI_BG_OFFSET0);
 		offset1 = rt2x00_get_field16(eeprom, EEPROM_RSSI_BG_OFFSET1);

drivers/net/wireless/rt2x00/rt2x00.h

@@ -699,6 +699,7 @@ struct rt2x00_dev {
 	struct ieee80211_hw *hw;
 	struct ieee80211_supported_band bands[IEEE80211_NUM_BANDS];
 	enum ieee80211_band curr_band;
+	int curr_freq;
 
 	/*
 	 * If enabled, the debugfs interface structures
@@ -850,11 +851,6 @@ struct rt2x00_dev {
 	 */
 	struct ieee80211_low_level_stats low_level_stats;
 
-	/*
-	 * RX configuration information.
-	 */
-	struct ieee80211_rx_status rx_status;
-
 	/*
 	 * Scheduled work.
 	 * NOTE: intf_work will use ieee80211_iterate_active_interfaces()

drivers/net/wireless/rt2x00/rt2x00config.c

@@ -201,10 +201,8 @@ void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
 		rt2x00link_reset_tuner(rt2x00dev, false);
 
 	rt2x00dev->curr_band = conf->channel->band;
+	rt2x00dev->curr_freq = conf->channel->center_freq;
 	rt2x00dev->tx_power = conf->power_level;
 	rt2x00dev->short_retry = conf->short_frame_max_tx_count;
 	rt2x00dev->long_retry = conf->long_frame_max_tx_count;
-
-	rt2x00dev->rx_status.band = conf->channel->band;
-	rt2x00dev->rx_status.freq = conf->channel->center_freq;
 }

drivers/net/wireless/rt2x00/rt2x00dev.c

@@ -464,7 +464,7 @@ void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
 {
 	struct rxdone_entry_desc rxdesc;
 	struct sk_buff *skb;
-	struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
+	struct ieee80211_rx_status *rx_status;
 	unsigned int header_length;
 	int rate_idx;
 
@@ -535,19 +535,21 @@ void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
 	 */
 	rt2x00link_update_stats(rt2x00dev, entry->skb, &rxdesc);
 	rt2x00debug_update_crypto(rt2x00dev, &rxdesc);
+	rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
 
+	/*
+	 * Initialize RX status information, and send frame
+	 * to mac80211.
+	 */
+	rx_status = IEEE80211_SKB_RXCB(entry->skb);
 	rx_status->mactime = rxdesc.timestamp;
+	rx_status->band = rt2x00dev->curr_band;
+	rx_status->freq = rt2x00dev->curr_freq;
 	rx_status->rate_idx = rate_idx;
 	rx_status->signal = rxdesc.rssi;
 	rx_status->flag = rxdesc.flags;
 	rx_status->antenna = rt2x00dev->link.ant.active.rx;
 
-	/*
-	 * Send frame to mac80211 & debugfs.
-	 * mac80211 will clean up the skb structure.
-	 */
-	rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
-	memcpy(IEEE80211_SKB_RXCB(entry->skb), rx_status, sizeof(*rx_status));
 	ieee80211_rx_ni(rt2x00dev->hw, entry->skb);
 
 	/*

drivers/net/wireless/rt2x00/rt61pci.c

@@ -1050,7 +1050,7 @@ static void rt61pci_link_tuner(struct rt2x00_dev *rt2x00dev,
 	/*
 	 * Determine r17 bounds.
 	 */
-	if (rt2x00dev->rx_status.band == IEEE80211_BAND_5GHZ) {
+	if (rt2x00dev->curr_band == IEEE80211_BAND_5GHZ) {
 		low_bound = 0x28;
 		up_bound = 0x48;
 		if (test_bit(CONFIG_EXTERNAL_LNA_A, &rt2x00dev->flags)) {
@@ -1972,7 +1972,7 @@ static int rt61pci_agc_to_rssi(struct rt2x00_dev *rt2x00dev, int rxd_w1)
 		return 0;
 	}
 
-	if (rt2x00dev->rx_status.band == IEEE80211_BAND_5GHZ) {
+	if (rt2x00dev->curr_band == IEEE80211_BAND_5GHZ) {
 		if (lna == 3 || lna == 2)
 			offset += 10;
 	}

drivers/net/wireless/rt2x00/rt73usb.c

@@ -929,7 +929,7 @@ static void rt73usb_link_tuner(struct rt2x00_dev *rt2x00dev,
 	/*
 	 * Determine r17 bounds.
 	 */
-	if (rt2x00dev->rx_status.band == IEEE80211_BAND_5GHZ) {
+	if (rt2x00dev->curr_band == IEEE80211_BAND_5GHZ) {
 		low_bound = 0x28;
 		up_bound = 0x48;
 
@@ -1597,7 +1597,7 @@ static int rt73usb_agc_to_rssi(struct rt2x00_dev *rt2x00dev, int rxd_w1)
 		return 0;
 	}
 
-	if (rt2x00dev->rx_status.band == IEEE80211_BAND_5GHZ) {
+	if (rt2x00dev->curr_band == IEEE80211_BAND_5GHZ) {
 		if (test_bit(CONFIG_EXTERNAL_LNA_A, &rt2x00dev->flags)) {
 			if (lna == 3 || lna == 2)
 				offset += 10;