iwlwifi: disable disconnected antenna for advanced bt coex

Disconnected antenna algorithm is used to find out which antennas are
disconnected. It should be disabled for devices that support advanced
bluetooth coexist.
Signed-off-by: Shanyu Zhao <shanyu.zhao@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-agn-calib.c

@@ -801,12 +801,6 @@ static void iwl_find_disconn_antenna(struct iwl_priv *priv, u32* average_sig,
 	 * To be safe, simply mask out any chains that we know
 	 * are not on the device.
 	 */
-	if (priv->cfg->bt_params &&
-	    priv->cfg->bt_params->advanced_bt_coexist &&
-	    priv->bt_full_concurrent) {
-		/* operated as 1x1 in full concurrency mode */
-		active_chains &= first_antenna(priv->hw_params.valid_rx_ant);
-	} else
 	active_chains &= priv->hw_params.valid_rx_ant;
 
 	num_tx_chains = 0;
@@ -985,6 +979,15 @@ void iwl_chain_noise_calibration(struct iwl_priv *priv, void *stat_resp)
 		return;
 
 	/* Analyze signal for disconnected antenna */
+	if (priv->cfg->bt_params &&
+	    priv->cfg->bt_params->advanced_bt_coexist) {
+		/* Disable disconnected antenna algorithm for advanced
+		   bt coex, assuming valid antennas are connected */
+		data->active_chains = priv->hw_params.valid_rx_ant;
+		for (i = 0; i < NUM_RX_CHAINS; i++)
+			if (!(data->active_chains & (1<<i)))
+				data->disconn_array[i] = 1;
+	} else
 		iwl_find_disconn_antenna(priv, average_sig, data);
 
 	/* Analyze noise for rx balance */