u32 low_rssi_thresh = 0;
        u32 middle_rssi_thresh = 0;
        u32 high_rssi_thresh = 0;
-       u8 rssi_level;
        struct ieee80211_sta *sta = NULL;
 
        if (is_hal_stop(rtlhal))
                if (rtlpriv->dm.undecorated_smoothed_pwdb >
                    (long)high_rssi_thresh) {
                        ra->ratr_state = DM_RATR_STA_HIGH;
-                       rssi_level = 1;
                } else if (rtlpriv->dm.undecorated_smoothed_pwdb >
                           (long)middle_rssi_thresh) {
                        ra->ratr_state = DM_RATR_STA_LOW;
-                       rssi_level = 3;
                } else if (rtlpriv->dm.undecorated_smoothed_pwdb >
                           (long)low_rssi_thresh) {
                        ra->ratr_state = DM_RATR_STA_LOW;
-                       rssi_level = 5;
                } else {
                        ra->ratr_state = DM_RATR_STA_ULTRALOW;
-                       rssi_level = 6;
                }
 
                if (ra->pre_ratr_state != ra->ratr_state) {
 
        struct fw_priv *pfw_priv = NULL;
        u8 *puc_mappedfile = NULL;
        u32 ul_filelength = 0;
-       u32 file_length = 0;
        u8 fwhdr_size = RT_8192S_FIRMWARE_HDR_SIZE;
        u8 fwstatus = FW_STATUS_INIT;
        bool rtstatus = true;
        firmware->fwstatus = FW_STATUS_INIT;
 
        puc_mappedfile = firmware->sz_fw_tmpbuffer;
-       file_length = firmware->sz_fw_tmpbufferlen;
 
        /* 1. Retrieve FW header. */
        firmware->pfwheader = (struct fw_hdr *) puc_mappedfile;
 
        struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 
        u8 reg_bw_opmode = 0;
-       u32 reg_ratr = 0, reg_rrsr = 0;
+       u32 reg_rrsr = 0;
        u8 regtmp = 0;
 
        reg_bw_opmode = BW_OPMODE_20MHZ;
-       reg_ratr = RATE_ALL_CCK | RATE_ALL_OFDM_AG | RATE_ALL_OFDM_1SS |
-                               RATE_ALL_OFDM_2SS;
        reg_rrsr = RATE_ALL_CCK | RATE_ALL_OFDM_AG;
 
        regtmp = rtl_read_byte(rtlpriv, INIRTSMCS_SEL);
 {
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        u8 bt_msr = rtl_read_byte(rtlpriv, MSR);
-       enum led_ctl_mode ledaction = LED_CTL_NO_LINK;
        u32 temp;
        bt_msr &= ~MSR_LINK_MASK;
 
        switch (type) {
        case NL80211_IFTYPE_UNSPECIFIED:
                bt_msr |= (MSR_LINK_NONE << MSR_LINK_SHIFT);
-               ledaction = LED_CTL_LINK;
                RT_TRACE(rtlpriv, COMP_INIT, DBG_TRACE,
                         ("Set Network type to NO LINK!\n"));
                break;
                break;
        case NL80211_IFTYPE_STATION:
                bt_msr |= (MSR_LINK_MANAGED << MSR_LINK_SHIFT);
-               ledaction = LED_CTL_LINK;
                RT_TRACE(rtlpriv, COMP_INIT, DBG_TRACE,
                         ("Set Network type to STA!\n"));
                break;
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
        struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
-       enum rf_pwrstate rfpwr_toset, cur_rfstate;
+       enum rf_pwrstate rfpwr_toset /*, cur_rfstate */;
        unsigned long flag = 0;
        bool actuallyset = false;
        bool turnonbypowerdomain = false;
                spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock, flag);
        }
 
-       cur_rfstate = ppsc->rfpwr_state;
+       /* cur_rfstate = ppsc->rfpwr_state;*/
 
        /* because after _rtl92s_phy_set_rfhalt, all power
         * closed, so we must open some power for GPIO check,
 
        struct rtl_phy *rtlphy = &(rtlpriv->phy);
        struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
        u8 reg_bw_opmode;
-       u8 reg_prsr_rsc;
 
        RT_TRACE(rtlpriv, COMP_SCAN, DBG_TRACE, ("Switch to %s bandwidth\n",
                  rtlphy->current_chan_bw == HT_CHANNEL_WIDTH_20 ?
        rtlphy->set_bwmode_inprogress = true;
 
        reg_bw_opmode = rtl_read_byte(rtlpriv, BW_OPMODE);
-       reg_prsr_rsc = rtl_read_byte(rtlpriv, RRSR + 2);
+       /* dummy read */
+       rtl_read_byte(rtlpriv, RRSR + 2);
 
        switch (rtlphy->current_chan_bw) {
        case HT_CHANNEL_WIDTH_20: