iwl3945: use changed in iwl3945_mac_config

In function iwl3945_mac_config use changed flag to call only
the affected functions.
Signed-off-by: Mohamed Abbas <mohamed.abbas@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl3945-base.c

@@ -3773,8 +3773,11 @@ static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed)
 	}
 #endif
 
-	if (conf->radio_enabled && iwl_radio_kill_sw_enable_radio(priv)) {
-		IWL_DEBUG_MAC80211(priv, "leave - RF-KILL - waiting for uCode\n");
+	if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) {
+		if (conf->radio_enabled &&
+		    iwl_radio_kill_sw_enable_radio(priv)) {
+			IWL_DEBUG_MAC80211(priv, "leave - RF-KILL - "
+						 "waiting for uCode\n");
 			goto out;
 		}
 
@@ -3783,6 +3786,7 @@ static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed)
 			IWL_DEBUG_MAC80211(priv, "leave - radio disabled\n");
 			goto out;
 		}
+	}
 
 	if (iwl_is_rfkill(priv)) {
 		IWL_DEBUG_MAC80211(priv, "leave - RF kill\n");