--- src/sys/dev/netif/bwi/bwimac.c	2007/10/14 04:15:18	1.8
+++ src/sys/dev/netif/bwi/bwimac.c	2007/10/21 09:50:33	1.9
@@ -1767,6 +1767,9 @@ bwi_mac_calibrate_txpower(struct bwi_mac
 	int error, i, ofdm_tssi;
 	int txpwr_diff, rf_atten_adj, bbp_atten_adj;
 
+	if (!sc->sc_txpwr_calib)
+		return;
+
 	if (mac->mac_flags & BWI_MAC_F_TPCTL_ERROR) {
 		DPRINTF(sc, BWI_DBG_MAC | BWI_DBG_TXPOWER, "%s\n",
 			"tpctl error happened, can't set txpower");