rt2x00: Implement broad- and multicast buffering

Although mac80211 buffers broad- and mutlicast frames for us in AP mode
we still have to send them out after a DTIM beacon. Implement this
behavior by sending out the buffered frames when the beacondone
interrupt is processed.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 30 insertions, 2 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c
index e2557257565..ae0adff0b83 100644
--- a/drivers/net/wireless/rt2x00/rt2x00dev.c
+++ b/drivers/net/wireless/rt2x00/rt2x00dev.c
@@ -178,6 +178,28 @@ static void rt2x00lib_intf_scheduled(struct work_struct *work)
 /*
  * Interrupt context handlers.
  */
+static void rt2x00lib_bc_buffer_iter(void *data, u8 *mac,
+                                     struct ieee80211_vif *vif)
+{
+        struct rt2x00_dev *rt2x00dev = data;
+        struct sk_buff *skb;
+
+        /*
+         * Only AP mode interfaces do broad- and multicast buffering
+         */
+        if (vif->type != NL80211_IFTYPE_AP)
+                return;
+
+        /*
+         * Send out buffered broad- and multicast frames
+         */
+        skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif);
+        while (skb) {
+                rt2x00mac_tx(rt2x00dev->hw, skb);
+                skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif);
+        }
+}
+
 static void rt2x00lib_beacondone_iter(void *data, u8 *mac,
                                       struct ieee80211_vif *vif)
 {
@@ -197,9 +219,15 @@ void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
         if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
                 return;
 
+        /* send buffered bc/mc frames out for every bssid */
         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
-                                           rt2x00lib_beacondone_iter,
-                                           rt2x00dev);
+                                            rt2x00lib_bc_buffer_iter,
+                                            rt2x00dev);
+
+        /* fetch next beacon */
+        ieee80211_iterate_active_interfaces(rt2x00dev->hw,
+                                            rt2x00lib_beacondone_iter,
+                                            rt2x00dev);
 
 }
 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);