Index: sys/dev/usb/wlan/if_rsu.c
===================================================================
--- sys/dev/usb/wlan/if_rsu.c
+++ sys/dev/usb/wlan/if_rsu.c
@@ -676,17 +676,20 @@
 static void
 rsu_scan_start(struct ieee80211com *ic)
 {
+	struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
 	struct rsu_softc *sc = ic->ic_softc;
 	int error;
 
 	/* Scanning is done by the firmware. */
 	RSU_LOCK(sc);
-	/* XXX TODO: force awake if in in network-sleep? */
-	error = rsu_site_survey(sc, TAILQ_FIRST(&ic->ic_vaps));
+	/* XXX TODO: force awake if in network-sleep? */
+	error = rsu_site_survey(sc, vap);
 	RSU_UNLOCK(sc);
-	if (error != 0)
+	if (error != 0) {
 		device_printf(sc->sc_dev,
 		    "could not send site survey command\n");
+		ieee80211_cancel_scan(vap);
+	}
 }
 
 static void