1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
index 3eeab0a99de..9f1c93bbb01 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
@@ -2205,3 +2205,20 @@ void iwlagn_set_rxon_chain(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
                 active_rx_cnt < idle_rx_cnt);
 }
+
+u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant, u8 valid)
+{
+        int i;
+        u8 ind = ant;
+
+        if (priv->band == IEEE80211_BAND_2GHZ &&
+            priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)
+                return 0;
+
+        for (i = 0; i < RATE_ANT_NUM - 1; i++) {
+                ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
+                if (valid & BIT(ind))
+                        return ind;
+        }
+        return ant;
+}