mac80211: Fix rate reporting regression

Mattias Nissler's "clean up rate selection" patch incorrectly changes
the behavior of txrate setting in sta_info. This patch backs out parts
of the rate selection consolidation in order to fix this issue for now.

Signed-off-by: Michael Wu <flamingice@sourmilk.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-3945-rs.c

@@ -657,14 +657,20 @@ static void rs_get_rate(void *priv_rate, struct net_device *dev,
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 	struct sta_info *sta;
-	u16 rate_mask;
+	u16 fc, rate_mask;
 	struct iwl3945_priv *priv = (struct iwl3945_priv *)priv_rate;
 	DECLARE_MAC_BUF(mac);
 
 	IWL_DEBUG_RATE("enter\n");
 
 	sta = sta_info_get(local, hdr->addr1);
-	if (!sta || !sta->rate_ctrl_priv) {
+
+	/* Send management frames and broadcast/multicast data using lowest
+	 * rate. */
+	fc = le16_to_cpu(hdr->frame_control);
+	if ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA ||
+	    is_multicast_ether_addr(hdr->addr1) ||
+	    !sta || !sta->rate_ctrl_priv) {
 		IWL_DEBUG_RATE("leave: No STA priv data to update!\n");
 		sel->rate = rate_lowest(local, local->oper_hw_mode, sta);
 		if (sta)

drivers/net/wireless/iwlwifi/iwl-4965-rs.c

@@ -2017,14 +2017,19 @@ static void rs_get_rate(void *priv_rate, struct net_device *dev,
 	struct ieee80211_conf *conf = &local->hw.conf;
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 	struct sta_info *sta;
+	u16 fc;
 	struct iwl4965_priv *priv = (struct iwl4965_priv *)priv_rate;
 	struct iwl4965_rate_scale_priv *lq;
 
 	IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n");
 
 	sta = sta_info_get(local, hdr->addr1);
 
-	if (!sta || !sta->rate_ctrl_priv) {
+	/* Send management frames and broadcast/multicast data using lowest
+	 * rate. */
+	fc = le16_to_cpu(hdr->frame_control);
+	if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1) ||
+	    !sta || !sta->rate_ctrl_priv) {
 		sel->rate = rate_lowest(local, local->oper_hw_mode, sta);
 		if (sta)
 			sta_info_put(sta);

net/mac80211/ieee80211_rate.c

@@ -168,29 +168,13 @@ void rate_control_get_rate(struct net_device *dev,
 {
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 	struct rate_control_ref *ref = local->rate_ctrl;
-	struct ieee80211_sub_if_data *sdata;
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 	struct sta_info *sta = sta_info_get(local, hdr->addr1);
 	int i;
-	u16 fc;
 
 	memset(sel, 0, sizeof(struct rate_selection));
 
-	/* Send management frames and broadcast/multicast data using lowest
-	 * rate. */
-	fc = le16_to_cpu(hdr->frame_control);
-	if ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA ||
-	    is_multicast_ether_addr(hdr->addr1))
-		sel->rate = rate_lowest(local, mode, sta);
-
-	/* If a forced rate is in effect, select it. */
-	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-	if (sdata->bss && sdata->bss->force_unicast_rateidx > -1)
-		sel->rate = &mode->rates[sdata->bss->force_unicast_rateidx];
-
-	/* If we haven't found the rate yet, ask the rate control algo. */
-	if (!sel->rate)
-		ref->ops->get_rate(ref->priv, dev, mode, skb, sel);
+	ref->ops->get_rate(ref->priv, dev, mode, skb, sel);
 
 	/* Select a non-ERP backup rate. */
 	if (!sel->nonerp) {

net/mac80211/rc80211_pid_algo.c

@@ -310,22 +310,36 @@ static void rate_control_pid_get_rate(void *priv, struct net_device *dev,
 {
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	struct ieee80211_sub_if_data *sdata;
 	struct sta_info *sta;
 	int rateidx;
+	u16 fc;
 
 	sta = sta_info_get(local, hdr->addr1);
 
-	if (!sta) {
-		sel->rate = rate_lowest(local, mode, NULL);
-		sta_info_put(sta);
+	/* Send management frames and broadcast/multicast data using lowest
+	 * rate. */
+	fc = le16_to_cpu(hdr->frame_control);
+	if ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA ||
+	    is_multicast_ether_addr(hdr->addr1) || !sta) {
+		sel->rate = rate_lowest(local, mode, sta);
+		if (sta)
+			sta_info_put(sta);
 		return;
 	}
 
+	/* If a forced rate is in effect, select it. */
+	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	if (sdata->bss && sdata->bss->force_unicast_rateidx > -1)
+		sta->txrate = sdata->bss->force_unicast_rateidx;
+
 	rateidx = sta->txrate;
 
 	if (rateidx >= mode->num_rates)
 		rateidx = mode->num_rates - 1;
 
+	sta->last_txrate = rateidx;
+
 	sta_info_put(sta);
 
 	sel->rate = &mode->rates[rateidx];

net/mac80211/rc80211_simple.c

@@ -207,21 +207,36 @@ rate_control_simple_get_rate(void *priv, struct net_device *dev,
 {
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	struct ieee80211_sub_if_data *sdata;
 	struct sta_info *sta;
 	int rateidx;
+	u16 fc;
 
 	sta = sta_info_get(local, hdr->addr1);
 
-	if (!sta) {
-		sel->rate = rate_lowest(local, mode, NULL);
+	/* Send management frames and broadcast/multicast data using lowest
+	 * rate. */
+	fc = le16_to_cpu(hdr->frame_control);
+	if ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA ||
+	    is_multicast_ether_addr(hdr->addr1) || !sta) {
+		sel->rate = rate_lowest(local, mode, sta);
+		if (sta)
+			sta_info_put(sta);
 		return;
 	}
 
+	/* If a forced rate is in effect, select it. */
+	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	if (sdata->bss && sdata->bss->force_unicast_rateidx > -1)
+		sta->txrate = sdata->bss->force_unicast_rateidx;
+
 	rateidx = sta->txrate;
 
 	if (rateidx >= mode->num_rates)
 		rateidx = mode->num_rates - 1;
 
+	sta->last_txrate = rateidx;
+
 	sta_info_put(sta);
 
 	sel->rate = &mode->rates[rateidx];