iwlwifi: add set_rxon_chain op

add set_rxon_chain op to iwlwifi cfg ops in preparation of
future 3945 porting work.

Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-4965.c

@@ -2278,6 +2278,7 @@ static struct iwl_station_mgmt_ops iwl4965_station_mgmt = {
 static struct iwl_hcmd_ops iwl4965_hcmd = {
 	.rxon_assoc = iwl4965_send_rxon_assoc,
 	.commit_rxon = iwl_commit_rxon,
+	.set_rxon_chain = iwl_set_rxon_chain,
 };
 
 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {

drivers/net/wireless/iwlwifi/iwl-5000.c

@@ -1482,6 +1482,7 @@ struct iwl_station_mgmt_ops iwl5000_station_mgmt = {
 struct iwl_hcmd_ops iwl5000_hcmd = {
 	.rxon_assoc = iwl5000_send_rxon_assoc,
 	.commit_rxon = iwl_commit_rxon,
+	.set_rxon_chain = iwl_set_rxon_chain,
 };
 
 struct iwl_hcmd_utils_ops iwl5000_hcmd_utils = {

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

@@ -246,7 +246,8 @@ int iwl_commit_rxon(struct iwl_priv *priv)
 void iwl_update_chain_flags(struct iwl_priv *priv)
 {
 
-	iwl_set_rxon_chain(priv);
+	if (priv->cfg->ops->hcmd->set_rxon_chain)
+		priv->cfg->ops->hcmd->set_rxon_chain(priv);
 	iwlcore_commit_rxon(priv);
 }
 
@@ -590,7 +591,10 @@ static void iwl_setup_rxon_timing(struct iwl_priv *priv)
 static int iwl_set_mode(struct iwl_priv *priv, int mode)
 {
 	iwl_connection_init_rx_config(priv, mode);
-	iwl_set_rxon_chain(priv);
+
+	if (priv->cfg->ops->hcmd->set_rxon_chain)
+		priv->cfg->ops->hcmd->set_rxon_chain(priv);
+
 	memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
 
 	priv->cfg->ops->smgmt->clear_station_table(priv);
@@ -1499,7 +1503,10 @@ static void iwl_alive_start(struct iwl_priv *priv)
 	} else {
 		/* Initialize our rx_config data */
 		iwl_connection_init_rx_config(priv, priv->iw_mode);
-		iwl_set_rxon_chain(priv);
+
+		if (priv->cfg->ops->hcmd->set_rxon_chain)
+			priv->cfg->ops->hcmd->set_rxon_chain(priv);
+
 		memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
 	}
 
@@ -1878,7 +1885,9 @@ void iwl_post_associate(struct iwl_priv *priv)
 
 	iwl_set_rxon_ht(priv, &priv->current_ht_config);
 
-	iwl_set_rxon_chain(priv);
+	if (priv->cfg->ops->hcmd->set_rxon_chain)
+		priv->cfg->ops->hcmd->set_rxon_chain(priv);
+
 	priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
 
 	IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
@@ -2182,7 +2191,8 @@ static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
 	}
 
 	/* call to ensure that 4965 rx_chain is set properly in monitor mode */
-	iwl_set_rxon_chain(priv);
+	if (priv->cfg->ops->hcmd->set_rxon_chain)
+		priv->cfg->ops->hcmd->set_rxon_chain(priv);
 
 	if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) {
 		if (conf->radio_enabled &&
@@ -2245,7 +2255,8 @@ static void iwl_config_ap(struct iwl_priv *priv)
 			IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
 					"Attempting to continue.\n");
 
-		iwl_set_rxon_chain(priv);
+		if (priv->cfg->ops->hcmd->set_rxon_chain)
+			priv->cfg->ops->hcmd->set_rxon_chain(priv);
 
 		/* FIXME: what should be the assoc_id for AP? */
 		priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);

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

@@ -821,7 +821,8 @@ void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
 
 	rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
 
-	iwl_set_rxon_chain(priv);
+	if (priv->cfg->ops->hcmd->set_rxon_chain)
+		priv->cfg->ops->hcmd->set_rxon_chain(priv);
 
 	IWL_DEBUG_ASSOC(priv, "supported HT rate 0x%X 0x%X 0x%X "
 			"rxon flags 0x%X operation mode :0x%X "
@@ -1380,7 +1381,9 @@ int iwl_init_drv(struct iwl_priv *priv)
 	priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DISABLED;
 
 	/* Choose which receivers/antennas to use */
-	iwl_set_rxon_chain(priv);
+	if (priv->cfg->ops->hcmd->set_rxon_chain)
+		priv->cfg->ops->hcmd->set_rxon_chain(priv);
+
 	iwl_init_scan_params(priv);
 
 	iwl_reset_qos(priv);
@@ -2257,7 +2260,9 @@ void iwl_bss_info_changed(struct ieee80211_hw *hw,
 
 	if (changes & BSS_CHANGED_HT) {
 		iwl_ht_conf(priv, bss_conf);
-		iwl_set_rxon_chain(priv);
+
+		if (priv->cfg->ops->hcmd->set_rxon_chain)
+			priv->cfg->ops->hcmd->set_rxon_chain(priv);
 	}
 
 	if (changes & BSS_CHANGED_ASSOC) {

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

@@ -95,6 +95,7 @@ struct iwl_station_mgmt_ops {
 struct iwl_hcmd_ops {
 	int (*rxon_assoc)(struct iwl_priv *priv);
 	int (*commit_rxon)(struct iwl_priv *priv);
+	void (*set_rxon_chain)(struct iwl_priv *priv);
 };
 
 struct iwl_hcmd_utils_ops {