mac80211: add ieee80211_tx_prepare_skb() helper function

[~andy/linux] / net / mac80211 / tx.c

diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 4fcbf634b54863387f85b42d5f47f82de861e995..acd9b61fbc07ec684b18bb1f9a9bba61d4637478 100644 (file)
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1366,6 +1366,35 @@ static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
        return 0;
 }
 
+bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
+                             struct ieee80211_vif *vif, struct sk_buff *skb,
+                             int band, struct ieee80211_sta **sta)
+{
+       struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+       struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+       struct ieee80211_tx_data tx;
+
+       if (ieee80211_tx_prepare(sdata, &tx, skb) == TX_DROP)
+               return false;
+
+       info->band = band;
+       info->control.vif = vif;
+       info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
+
+       if (invoke_tx_handlers(&tx))
+               return false;
+
+       if (sta) {
+               if (tx.sta)
+                       *sta = &tx.sta->sta;
+               else
+                       *sta = NULL;
+       }
+
+       return true;
+}
+EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
+
 /*
  * Returns false if the frame couldn't be transmitted but was queued instead.
  */