+// check ac/dc status with the help of user space application */
+static int r8192_wx_adapter_power_status(struct net_device *dev,
+ struct iw_request_info *info,
+ union iwreq_data *wrqu, char *extra)
+{
+ struct r8192_priv *priv = ieee80211_priv(dev);
+#ifdef ENABLE_LPS
+ PRT_POWER_SAVE_CONTROL pPSC = (PRT_POWER_SAVE_CONTROL)(&(priv->ieee80211->PowerSaveControl));
+ struct ieee80211_device* ieee = priv->ieee80211;
+#endif
+ down(&priv->wx_sem);
+
+#ifdef ENABLE_LPS
+ RT_TRACE(COMP_POWER, "%s(): %s\n",__FUNCTION__, (*extra == 6)?"DC power":"AC power");
+ // ieee->ps shall not be set under DC mode, otherwise it conflict
+ // with Leisure power save mode setting.
+ //
+ if(*extra || priv->force_lps) {
+ priv->ps_force = false;
+ pPSC->bLeisurePs = true;
+ } else {
+ //LZM for PS-Poll AID issue. 090429
+ if(priv->ieee80211->state == IEEE80211_LINKED)
+ LeisurePSLeave(dev);
+
+ priv->ps_force = true;
+ pPSC->bLeisurePs = false;
+ ieee->ps = *extra;
+ }
+
+#endif
+ up(&priv->wx_sem);
+ return 0;
+
+}
+