cfg80211: set the rates mask in connection probes over specified freq

ATM, specifying the frequency when connecting sends a void 'supported
rates' EID.

Signed-off-by: Karl Beldan <karl.beldan@rivierawaves.com>
[fix memory leak in error path]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/wireless/sme.c

@@ -80,9 +80,18 @@ static int cfg80211_conn_scan(struct wireless_dev *wdev)
 	if (!request)
 		return -ENOMEM;
 
-	if (wdev->conn->params.channel)
+	if (wdev->conn->params.channel) {
+		enum ieee80211_band band = wdev->conn->params.channel->band;
+		struct ieee80211_supported_band *sband =
+			wdev->wiphy->bands[band];
+
+		if (!sband) {
+			kfree(request);
+			return -EINVAL;
+		}
 		request->channels[0] = wdev->conn->params.channel;
-	else {
+		request->rates[band] = (1 << sband->n_bitrates) - 1;
+	} else {
 		int i = 0, j;
 		enum ieee80211_band band;
 		struct ieee80211_supported_band *bands;