mac80211: Use suitable semantics for beacon availability indication

Currently beacon availability upon association is marked by have_beacon
flag of assoc_data structure that becomes unavailable when association
completes. However beacon availability indication is required also after
association to inform a driver. Currently dtim_period parameter is used
for this purpose. Move have_beacon flag to another structure, persistant
throughout a interface's life cycle. Use suitable sematics for beacon
availability indication.

Signed-off-by: Alexander Bondar <alexander.bondar@intel.com>
[fix another instance of BSS_CHANGED_DTIM_PERIOD in docs]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 89a83770d152..5a6c1351d1d3 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1584,8 +1584,9 @@ int ieee80211_reconfig(struct ieee80211_local *local)
                                    BSS_CHANGED_ARP_FILTER |
                                    BSS_CHANGED_PS;
 
-                        if (sdata->u.mgd.dtim_period)
-                                changed |= BSS_CHANGED_DTIM_PERIOD;
+                        /* Re-send beacon info report to the driver */
+                        if (sdata->u.mgd.have_beacon)
+                                changed |= BSS_CHANGED_BEACON_INFO;
 
                         sdata_lock(sdata);
                         ieee80211_bss_info_change_notify(sdata, changed);