iwlagn: enable 11n aggregation without checking traffic load

Enable HT aggregation when it reach reasonable traffic without
checking traffic load which delay enabling the aggregation and lower
the throughput

but this behavior can be overwrite by module parameter

this address
https://bugzilla.kernel.org/show_bug.cgi?id=40042

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-lib.c

@@ -612,6 +612,7 @@ struct iwl_mod_params iwlagn_mod_params = {
 	.power_level = IWL_POWER_INDEX_1,
 	.bt_ch_announce = 1,
 	.wanted_ucode_alternative = 1,
+	.auto_agg = true,
 	/* the rest are 0 by default */
 };
 

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

@@ -420,7 +420,7 @@ static int rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv,
 
 	load = rs_tl_get_load(lq_data, tid);
 
-	if (load > IWL_AGG_LOAD_THRESHOLD) {
+	if ((iwlagn_mod_params.auto_agg) || (load > IWL_AGG_LOAD_THRESHOLD)) {
 		IWL_DEBUG_HT(priv, "Starting Tx agg: STA: %pM tid: %d\n",
 				sta->addr, tid);
 		ret = ieee80211_start_tx_ba_session(sta, tid, 5000);

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

@@ -3588,6 +3588,11 @@ module_param_named(power_level, iwlagn_mod_params.power_level,
 MODULE_PARM_DESC(power_level,
 		 "default power save level (range from 1 - 5, default: 1)");
 
+module_param_named(auto_agg, iwlagn_mod_params.auto_agg,
+		bool, S_IRUGO);
+MODULE_PARM_DESC(auto_agg,
+		 "enable agg w/o check traffic load (default: enable)");
+
 /*
  * For now, keep using power level 1 instead of automatically
  * adjusting ...

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

@@ -93,6 +93,7 @@ struct iwl_mod_params {
 	int ant_coupling;
 	bool bt_ch_announce;
 	int wanted_ucode_alternative;
+	bool auto_agg;		/* def: true = enable agg. without check */
 };
 
 /**