iwlagn: fill beacon TX rate properly

Use the rate that mac80211 requested to fill the
uCode TX command for the beacon. Unfortunately,
the uCode is (currently?) ignoring it, but now
at least fill it properly.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

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

@@ -132,6 +132,7 @@ int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
 	struct iwl_host_cmd cmd = {
 		.id = REPLY_TX_BEACON,
 	};
+	struct ieee80211_tx_info *info;
 	u32 frame_size;
 	u32 rate_flags;
 	u32 rate;
@@ -172,14 +173,31 @@ int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
 			   frame_size);
 
 	/* Set up packet rate and flags */
-	rate = iwl_rate_get_lowest_plcp(priv, priv->beacon_ctx);
+	info = IEEE80211_SKB_CB(priv->beacon_skb);
+
+	/*
+	 * Let's set up the rate at least somewhat correctly;
+	 * it will currently not actually be used by the uCode,
+	 * it uses the broadcast station's rate instead.
+	 */
+	if (info->control.rates[0].idx < 0 ||
+	    info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
+		rate = 0;
+	else
+		rate = info->control.rates[0].idx;
+
 	priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 					      priv->hw_params.valid_tx_ant);
 	rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
-	if ((rate >= IWL_FIRST_CCK_RATE) && (rate <= IWL_LAST_CCK_RATE))
+
+	/* In mac80211, rates for 5 GHz start at 0 */
+	if (info->band == IEEE80211_BAND_5GHZ)
+		rate += IWL_FIRST_OFDM_RATE;
+	else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
 		rate_flags |= RATE_MCS_CCK_MSK;
-	tx_beacon_cmd->tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate,
-			rate_flags);
+
+	tx_beacon_cmd->tx.rate_n_flags =
+			iwl_hw_set_rate_n_flags(rate, rate_flags);
 
 	/* Submit command */
 	cmd.len[0] = sizeof(*tx_beacon_cmd);

drivers/net/wireless/iwlwifi/iwl-core.c

@@ -526,19 +526,6 @@ int iwl_full_rxon_required(struct iwl_priv *priv,
 	return 0;
 }
 
-u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv,
-			    struct iwl_rxon_context *ctx)
-{
-	/*
-	 * Assign the lowest rate -- should really get this from
-	 * the beacon skb from mac80211.
-	 */
-	if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
-		return IWL_RATE_1M_PLCP;
-	else
-		return IWL_RATE_6M_PLCP;
-}
-
 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
 			     struct iwl_ht_config *ht_conf,
 			     struct iwl_rxon_context *ctx)

drivers/net/wireless/iwlwifi/iwl-core.h

@@ -408,13 +408,6 @@ void iwl_setup_watchdog(struct iwl_priv *priv);
  ****************************************************/
 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force);
 
-/*******************************************************************************
- * Rate
- ******************************************************************************/
-
-u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv,
-			    struct iwl_rxon_context *ctx);
-
 /*******************************************************************************
  * Scanning
  ******************************************************************************/