If the driver does not specify a maximum power output, default to the
regulatory max.
Signed-off-by: John W. Linville <linville@tuxdriver.com>
        chan->flags = flags;
        chan->max_antenna_gain = min(chan->orig_mag,
                                         rg->max_antenna_gain);
-       chan->max_power = min(chan->orig_mpwr, rg->max_power);
+       if (chan->orig_mpwr)
+               chan->max_power = min(chan->orig_mpwr, rg->max_power);
+       else
+               chan->max_power = rg->max_power;
 }
 
 static void handle_band(struct ieee80211_supported_band *sband,