}
 };
 
-static int rtw_ieee80211_channel_to_frequency(int chan, int band)
+static int rtw_ieee80211_channel_to_frequency(int chan)
 {
        /* NL80211_BAND_2GHZ */
        if (chan == 14)
        /* channels apply by channel plans. */
        for (i = 0; i < max_chan_nums; i++) {
                channel = channel_set[i].ChannelNum;
-               freq =
-                   rtw_ieee80211_channel_to_frequency(channel,
-                                                      NL80211_BAND_2GHZ);
-
+               freq = rtw_ieee80211_channel_to_frequency(channel);
                ch = ieee80211_get_channel(wiphy, freq);
                if (ch) {
                        if (channel_set[i].ScanType == SCAN_PASSIVE)