openwrt/package/kernel/mac80211/patches/210-ap_scan.patch

--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1981,7 +1981,7 @@ static int ieee80211_scan(struct wiphy *
 		 * the  frames sent while scanning on other channel will be
 		 * lost)
 		 */
-		if (sdata->u.ap.beacon &&
+		if (0 && sdata->u.ap.beacon &&
 		    (!(wiphy->features & NL80211_FEATURE_AP_SCAN) ||
 		     !(req->flags & NL80211_SCAN_FLAG_AP)))
 			return -EOPNOTSUPP;