cfg80211: set initial monitor channel
Implements behaviour seen in mac80211. A running
monitor always has a channel - even before
.set_channel. This way we won't break current
behaviour.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/wireless/core.c b/net/wireless/core.c
index 1b5daa7..580551e 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -717,6 +717,35 @@
.name = "wlan",
};
+static struct ieee80211_channel *
+cfg80211_get_any_chan(struct cfg80211_registered_device *rdev)
+{
+ struct ieee80211_supported_band *sband;
+ int i;
+
+ for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
+ sband = rdev->wiphy.bands[i];
+ if (sband && sband->n_channels > 0)
+ return &sband->channels[0];
+ }
+
+ return NULL;
+}
+
+static void cfg80211_init_mon_chan(struct cfg80211_registered_device *rdev)
+{
+ struct ieee80211_channel *chan;
+
+ chan = cfg80211_get_any_chan(rdev);
+ if (WARN_ON(!chan))
+ return;
+
+ mutex_lock(&rdev->devlist_mtx);
+ WARN_ON(cfg80211_set_monitor_channel(rdev, chan->center_freq,
+ NL80211_CHAN_NO_HT));
+ mutex_unlock(&rdev->devlist_mtx);
+}
+
void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
enum nl80211_iftype iftype, int num)
{
@@ -737,6 +766,8 @@
if (!has_monitors_only_new) {
rdev->monitor_channel = NULL;
rdev->monitor_channel_type = NL80211_CHAN_NO_HT;
+ } else {
+ cfg80211_init_mon_chan(rdev);
}
}
}
