---

yaml
---
r: 314825
b: refs/heads/master
c: 46c1dd0
h: refs/heads/master
i:
  314823: a3a2dc9
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 2bd7e35da011f51d4fdb3b71f888c3a50194bfcd
+refs/heads/master: 46c1dd0c7fac54d3739d62b6362024d9b568c6de

trunk/net/wireless/nl80211.c

@@ -2335,6 +2335,33 @@ static int nl80211_parse_beacon(struct genl_info *info,
 	return 0;
 }
 
+static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
+				   struct cfg80211_ap_settings *params)
+{
+	struct wireless_dev *wdev;
+	bool ret = false;
+
+	mutex_lock(&rdev->devlist_mtx);
+
+	list_for_each_entry(wdev, &rdev->netdev_list, list) {
+		if (wdev->iftype != NL80211_IFTYPE_AP &&
+		    wdev->iftype != NL80211_IFTYPE_P2P_GO)
+			continue;
+
+		if (!wdev->preset_chan)
+			continue;
+
+		params->channel = wdev->preset_chan;
+		params->channel_type = wdev->preset_chantype;
+		ret = true;
+		break;
+	}
+
+	mutex_unlock(&rdev->devlist_mtx);
+
+	return ret;
+}
+
 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
 {
 	struct cfg80211_registered_device *rdev = info->user_ptr[0];
@@ -2437,16 +2464,19 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
 	} else if (wdev->preset_chan) {
 		params.channel = wdev->preset_chan;
 		params.channel_type = wdev->preset_chantype;
-	} else
+	} else if (!nl80211_get_ap_channel(rdev, &params))
 		return -EINVAL;
 
 	if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, params.channel,
 					  params.channel_type))
 		return -EINVAL;
 
 	err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
-	if (!err)
+	if (!err) {
+		wdev->preset_chan = params.channel;
+		wdev->preset_chantype = params.channel_type;
 		wdev->beacon_interval = params.beacon_interval;
+	}
 	return err;
 }