[PATCH] ipw2100: Fix `iwpriv set_power` error

iwpriv <iface> set_power [0~6] can be used for ipw2100. '0' indicates
off and '6' indicates auto. 1~5 are the actual power levels.
Signed-off-by: NZhu Yi <yi.zhu@intel.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ipw2100.c

@@ -7868,10 +7868,10 @@ static int ipw2100_wx_set_powermode(struct net_device *dev,
 		goto done;
 	}
 
-	if ((mode < 1) || (mode > POWER_MODES))
+	if ((mode < 0) || (mode > POWER_MODES))
 		mode = IPW_POWER_AUTO;
 
-	if (priv->power_mode != mode)
+	if (IPW_POWER_LEVEL(priv->power_mode) != mode)
 		err = ipw2100_set_power_mode(priv, mode);
       done:
 	mutex_unlock(&priv->action_mutex);
@@ -7902,7 +7902,7 @@ static int ipw2100_wx_get_powermode(struct net_device *dev,
 			break;
 		case IPW_POWER_AUTO:
 			snprintf(extra, MAX_POWER_STRING,
-				 "Power save level: %d (Auto)", 0);
+				 "Power save level: %d (Auto)", level);
 			break;
 		default:
 			timeout = timeout_duration[level - 1] / 1000;