mac80211: rate control status only for controlled packets

This patch changes mac80211 to not notify the rate control algorithm's
tx_status() method when reporting status for a packet that didn't go
through the rate control algorithm's get_rate() method.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index d881ed8..6f3bc4c 100644 (file)
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -245,6 +245,9 @@ struct ieee80211_bss_conf {
  * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be
  *     set by rate control algorithms to indicate probe rate, will
  *     be cleared for fragmented frames (except on the last fragment)
+ * @IEEE80211_TX_INTFL_RCALGO: mac80211 internal flag, do not test or
+ *     set this flag in the driver; indicates that the rate control
+ *     algorithm was used and should be notified of TX status
  */
 enum mac80211_tx_control_flags {
        IEEE80211_TX_CTL_REQ_TX_STATUS          = BIT(0),
@@ -260,6 +263,7 @@ enum mac80211_tx_control_flags {
        IEEE80211_TX_STAT_AMPDU                 = BIT(10),
        IEEE80211_TX_STAT_AMPDU_NO_BACK         = BIT(11),
        IEEE80211_TX_CTL_RATE_CTRL_PROBE        = BIT(12),
+       IEEE80211_TX_INTFL_RCALGO               = BIT(13),
 };
 
 /**

diff --git a/net/mac80211/rate.c b/net/mac80211/rate.c
index 3fa7ab2..4641f00 100644 (file)
--- a/net/mac80211/rate.c
+++ b/net/mac80211/rate.c
@@ -219,10 +219,12 @@ void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
                info->control.rates[i].count = 1;
        }
 
-       if (sta && sdata->force_unicast_rateidx > -1)
+       if (sta && sdata->force_unicast_rateidx > -1) {
                info->control.rates[0].idx = sdata->force_unicast_rateidx;
-       else
+       } else {
                ref->ops->get_rate(ref->priv, ista, priv_sta, txrc);
+               info->flags |= IEEE80211_TX_INTFL_RCALGO;
+       }
 
        /*
         * try to enforce the maximum rate the user wanted

diff --git a/net/mac80211/rate.h b/net/mac80211/rate.h
index b9164c9..2ab5ad9 100644 (file)
--- a/net/mac80211/rate.h
+++ b/net/mac80211/rate.h
@@ -44,8 +44,10 @@ static inline void rate_control_tx_status(struct ieee80211_local *local,
        struct rate_control_ref *ref = local->rate_ctrl;
        struct ieee80211_sta *ista = &sta->sta;
        void *priv_sta = sta->rate_ctrl_priv;
+       struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 
-       ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
+       if (likely(info->flags & IEEE80211_TX_INTFL_RCALGO))
+               ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
 }