iwlwifi: put use_rts_for_aggregation into hw_params

The hardware config ht_params shouldn't be modified,
so copy the use_rts_for_aggregation parameter into
hw_params and use/modify it there.
Signed-off-by: Johannes Berg <johannes.berg@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-rxon.c

@@ -436,8 +436,7 @@ int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 	 * force CTS-to-self frames protection if RTS-CTS is not preferred
 	 * one aggregation protection method
 	 */
-	if (!(cfg(priv)->ht_params &&
-	      cfg(priv)->ht_params->use_rts_for_aggregation))
+	if (!hw_params(priv).use_rts_for_aggregation)
 		ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
 
 	if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||

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

@@ -594,8 +594,7 @@ int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
 	sta_priv->max_agg_bufsize =
 		min(sta_priv->max_agg_bufsize, buf_size);
 
-	if (cfg(priv)->ht_params &&
-	    cfg(priv)->ht_params->use_rts_for_aggregation) {
+	if (hw_params(priv).use_rts_for_aggregation) {
 		/*
 		 * switch to RTS/CTS if it is the prefer protection
 		 * method for HT traffic

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

@@ -1119,6 +1119,10 @@ static void iwl_uninit_drv(struct iwl_priv *priv)
 
 static void iwl_set_hw_params(struct iwl_priv *priv)
 {
+	if (cfg(priv)->ht_params)
+		hw_params(priv).use_rts_for_aggregation =
+			cfg(priv)->ht_params->use_rts_for_aggregation;
+
 	if (iwlagn_mod_params.amsdu_size_8K)
 		hw_params(priv).rx_page_order =
 			get_order(IWL_RX_BUF_SIZE_8K);

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

@@ -2431,7 +2431,7 @@ static ssize_t iwl_dbgfs_protection_mode_read(struct file *file,
 	if (cfg(priv)->ht_params)
 		pos += scnprintf(buf + pos, bufsz - pos,
 			 "use %s for aggregation\n",
-			 (cfg(priv)->ht_params->use_rts_for_aggregation) ?
+			 (hw_params(priv).use_rts_for_aggregation) ?
 				"rts/cts" : "cts-to-self");
 	else
 		pos += scnprintf(buf + pos, bufsz - pos, "N/A");
@@ -2458,9 +2458,9 @@ static ssize_t iwl_dbgfs_protection_mode_write(struct file *file,
 	if (sscanf(buf, "%d", &rts) != 1)
 		return -EINVAL;
 	if (rts)
-		cfg(priv)->ht_params->use_rts_for_aggregation = true;
+		hw_params(priv).use_rts_for_aggregation = true;
 	else
-		cfg(priv)->ht_params->use_rts_for_aggregation = false;
+		hw_params(priv).use_rts_for_aggregation = false;
 	return count;
 }
 

drivers/net/wireless/iwlwifi/iwl-mac80211.c

@@ -660,8 +660,8 @@ static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 			IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 				     priv->agg_tids_count);
 		}
-		if (!priv->agg_tids_count && cfg(priv)->ht_params &&
-		    cfg(priv)->ht_params->use_rts_for_aggregation) {
+		if (!priv->agg_tids_count &&
+		    hw_params(priv).use_rts_for_aggregation) {
 			/*
 			 * switch off RTS/CTS if it was previously enabled
 			 */

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

@@ -174,6 +174,7 @@ struct iwl_mod_params {
  *	relevant for 1000, 6000 and up
  * @wd_timeout: TX queues watchdog timeout
  * @struct iwl_sensitivity_ranges: range of sensitivity values
+ * @use_rts_for_aggregation: use rts/cts protection for HT traffic
  */
 struct iwl_hw_params {
 	u8  max_txq_num;
@@ -183,6 +184,7 @@ struct iwl_hw_params {
 	u8  valid_tx_ant;
 	u8  valid_rx_ant;
 	u8  ht40_channel;
+	bool use_rts_for_aggregation;
 	u16 sku;
 	u32 rx_page_order;
 	u32 ct_kill_threshold;