mac80211: don't send null data packet when not associated

On resume or firmware recovery, mac80211 sends a null
data packet to see if the AP is still around and hasn't
disconnected us. However, it always does this even if
it wasn't even connected before, leading to a warning
in the new channel context code. Fix this by checking
that it's associated.

Cc: stable@vger.kernel.org
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index e6e4bda0528e..fa1d343faa4b 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1491,6 +1491,8 @@ int ieee80211_reconfig(struct ieee80211_local *local)
                 list_for_each_entry(sdata, &local->interfaces, list) {
                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
                                 continue;
+                        if (!sdata->u.mgd.associated)
+                                continue;
 
                         ieee80211_send_nullfunc(local, sdata, 0);
                 }