+static int ieee80211_set_channel(struct wiphy *wiphy,
+ struct net_device *netdev,
+ struct ieee80211_channel *chan,
+ enum nl80211_channel_type channel_type)
+{
+ struct ieee80211_local *local = wiphy_priv(wiphy);
+ struct ieee80211_sub_if_data *sdata = NULL;
+
+ if (netdev)
+ sdata = IEEE80211_DEV_TO_SUB_IF(netdev);
+
+ switch (ieee80211_get_channel_mode(local, NULL)) {
+ case CHAN_MODE_HOPPING:
+ return -EBUSY;
+ case CHAN_MODE_FIXED:
+ if (local->oper_channel != chan)
+ return -EBUSY;
+ if (!sdata && local->_oper_channel_type == channel_type)
+ return 0;
+ break;
+ case CHAN_MODE_UNDEFINED:
+ break;
+ }
+
+ if (!ieee80211_set_channel_type(local, sdata, channel_type))
+ return -EBUSY;
+
+ local->oper_channel = chan;
+
+ /* auto-detects changes */
+ ieee80211_hw_config(local, 0);
+
+ return 0;
+}
+