iwlwifi: turn on RTS/CTS after aggregation become operational
If RTS/CTS protection is needed for HT, wait until get operational
notification from mac80211, then inform uCode to switch to RTS/CTS
through RXON command.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 7488a68..3368cfd 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -3368,6 +3368,25 @@
return ret;
}
+/*
+ * switch to RTS/CTS for TX
+ */
+static void iwl_enable_rts_cts(struct iwl_priv *priv)
+{
+
+ if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+ return;
+
+ priv->staging_rxon.flags &= ~RXON_FLG_SELF_CTS_EN;
+ if (!test_bit(STATUS_SCANNING, &priv->status)) {
+ IWL_DEBUG_INFO(priv, "use RTS/CTS protection\n");
+ iwlcore_commit_rxon(priv);
+ } else {
+ /* scanning, defer the request until scan completed */
+ IWL_DEBUG_INFO(priv, "defer setting RTS/CTS protection\n");
+ }
+}
+
static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
enum ieee80211_ampdu_mlme_action action,
@@ -3416,7 +3435,14 @@
ret = 0;
break;
case IEEE80211_AMPDU_TX_OPERATIONAL:
- /* do nothing, return value ignored */
+ if (priv->cfg->use_rts_for_ht) {
+ /*
+ * switch to RTS/CTS if it is the prefer protection
+ * method for HT traffic
+ */
+ iwl_enable_rts_cts(priv);
+ }
+ ret = 0;
break;
}
mutex_unlock(&priv->mutex);