ath5k: disable beacon filter when station is not associated

Ath5k driver has too many interrupts per second at idle
http://bugzilla.kernel.org/show_bug.cgi?id=11749

Signed-off-by: Martin Xu <martin.xu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 35 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath5k/base.c b/drivers/net/wireless/ath5k/base.c
index cfd4d052d666..2d14255eb103 100644
--- a/drivers/net/wireless/ath5k/base.c
+++ b/drivers/net/wireless/ath5k/base.c
@@ -240,6 +240,10 @@ static u64 ath5k_get_tsf(struct ieee80211_hw *hw);
 static void ath5k_reset_tsf(struct ieee80211_hw *hw);
 static int ath5k_beacon_update(struct ieee80211_hw *hw,
                 struct sk_buff *skb);
+static void ath5k_bss_info_changed(struct ieee80211_hw *hw,
+                struct ieee80211_vif *vif,
+                struct ieee80211_bss_conf *bss_conf,
+                u32 changes);
 
 static struct ieee80211_ops ath5k_hw_ops = {
         .tx             = ath5k_tx,
@@ -256,6 +260,7 @@ static struct ieee80211_ops ath5k_hw_ops = {
         .get_tx_stats   = ath5k_get_tx_stats,
         .get_tsf        = ath5k_get_tsf,
         .reset_tsf      = ath5k_reset_tsf,
+        .bss_info_changed = ath5k_bss_info_changed,
 };
 
 /*
@@ -2942,7 +2947,7 @@ static void ath5k_configure_filter(struct ieee80211_hw *hw,
                 sc->opmode != NL80211_IFTYPE_MESH_POINT &&
                 test_bit(ATH_STAT_PROMISC, sc->status))
                 rfilt |= AR5K_RX_FILTER_PROM;
-        if (sc->opmode == NL80211_IFTYPE_STATION ||
+        if ((sc->opmode == NL80211_IFTYPE_STATION && sc->assoc) ||
                 sc->opmode == NL80211_IFTYPE_ADHOC) {
                 rfilt |= AR5K_RX_FILTER_BEACON;
         }
@@ -3083,4 +3088,32 @@ ath5k_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
 end:
         return ret;
 }
+static void
+set_beacon_filter(struct ieee80211_hw *hw, bool enable)
+{
+        struct ath5k_softc *sc = hw->priv;
+        struct ath5k_hw *ah = sc->ah;
+        u32 rfilt;
+        rfilt = ath5k_hw_get_rx_filter(ah);
+        if (enable)
+                rfilt |= AR5K_RX_FILTER_BEACON;
+        else
+                rfilt &= ~AR5K_RX_FILTER_BEACON;
+        ath5k_hw_set_rx_filter(ah, rfilt);
+        sc->filter_flags = rfilt;
+}
 
+static void ath5k_bss_info_changed(struct ieee80211_hw *hw,
+                                    struct ieee80211_vif *vif,
+                                    struct ieee80211_bss_conf *bss_conf,
+                                    u32 changes)
+{
+        struct ath5k_softc *sc = hw->priv;
+        if (changes & BSS_CHANGED_ASSOC) {
+                mutex_lock(&sc->lock);
+                sc->assoc = bss_conf->assoc;
+                if (sc->opmode == NL80211_IFTYPE_STATION)
+                        set_beacon_filter(hw, sc->assoc);
+                mutex_unlock(&sc->lock);
+        }
+}
diff --git a/drivers/net/wireless/ath5k/base.h b/drivers/net/wireless/ath5k/base.h
index 06d1054ca94b..facc60ddada2 100644
--- a/drivers/net/wireless/ath5k/base.h
+++ b/drivers/net/wireless/ath5k/base.h
@@ -179,6 +179,7 @@ struct ath5k_softc {
 
         struct timer_list       calib_tim;      /* calibration timer */
         int                     power_level;    /* Requested tx power in dbm */
+        bool                    assoc;          /* assocate state */
 };
 
 #define ath5k_hw_hasbssidmask(_ah) \