cfg80211: consider existing DFS interfaces
It was possible to break interface combinations in
the following way:
combo 1: iftype = AP, num_ifaces = 2, num_chans = 2,
combo 2: iftype = AP, num_ifaces = 1, num_chans = 1, radar = HT20
With the above interface combinations it was
possible to:
step 1. start AP on DFS channel by matching combo 2
step 2. start AP on non-DFS channel by matching combo 1
This was possible beacuse (step 2) did not consider
if other interfaces require radar detection.
The patch changes how cfg80211 tracks channels -
instead of channel itself now a complete chandef
is stored.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 7526a4d..780b454 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -1357,7 +1357,7 @@
*/
mutex_lock_nested(&wdev_iter->mtx, 1);
__acquire(wdev_iter->mtx);
- cfg80211_get_chan_state(wdev_iter, &ch, &chmode);
+ cfg80211_get_chan_state(wdev_iter, &ch, &chmode, &radar_detect);
wdev_unlock(wdev_iter);
switch (chmode) {