diff -urN madwifi-ng-refcount-r2313-20070505.old/ath/if_ath.c madwifi-ng-refcount-r2313-20070505.dev/ath/if_ath.c
--- madwifi-ng-refcount-r2313-20070505.old/ath/if_ath.c	2007-05-13 18:17:55.362152712 +0200
+++ madwifi-ng-refcount-r2313-20070505.dev/ath/if_ath.c	2007-05-13 18:17:55.614114408 +0200
@@ -2003,7 +2003,10 @@
 		ath_draintxq(sc);
 		if (!sc->sc_invalid) {
 			ath_stoprecv(sc);
+
+			/* XXX: this helps to avoid crashes on ifconfig down/up
 			ath_hal_phydisable(ah);
+			 */
 		} else
 			sc->sc_rxlink = NULL;
 		ath_beacon_free(sc);		/* XXX needed? */