mac80211: clear sdata->radar_required

If ieee80211_vif_use_channel() fails, we have to clear
sdata->radar_required (which we might have just set).

Failing to do it results in stale radar_required field
which prevents starting new scan requests.

Reported-by: Jouni Malinen <j@w1.fi>
Signed-off-by: Eliad Peller <eliad@wizery.com>
[use false instead of 0]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c
index ff0d2db..5bcd4e5 100644 (file)
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -1508,6 +1508,8 @@ static void __ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata)
        if (ieee80211_chanctx_refcount(local, ctx) == 0)
                ieee80211_free_chanctx(local, ctx);
 
+       sdata->radar_required = false;
+
        /* Unreserving may ready an in-place reservation. */
        if (use_reserved_switch)
                ieee80211_vif_use_reserved_switch(local);
@@ -1566,6 +1568,9 @@ int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
        ieee80211_recalc_smps_chanctx(local, ctx);
        ieee80211_recalc_radar_chanctx(local, ctx);
  out:
+       if (ret)
+               sdata->radar_required = false;
+
        mutex_unlock(&local->chanctx_mtx);
        return ret;
 }