mac80211: Save probe response data for bss

Allow setting a probe response template for an interface operating in
AP mode. Low level drivers are notified about changes in the probe
response template and are able to retrieve a copy of the current probe
response. This data can, for example, be uploaded to hardware as a
template.

Signed-off-by: Guy Eilam <guy@wizery.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 7b0c25bf8bbf..12a6d4bb5d37 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -462,15 +462,19 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
                 struct ieee80211_sub_if_data *vlan, *tmpsdata;
                 struct beacon_data *old_beacon =
                         rtnl_dereference(sdata->u.ap.beacon);
+                struct sk_buff *old_probe_resp =
+                        rtnl_dereference(sdata->u.ap.probe_resp);
 
                 /* sdata_running will return false, so this will disable */
                 ieee80211_bss_info_change_notify(sdata,
                                                  BSS_CHANGED_BEACON_ENABLED);
 
-                /* remove beacon */
+                /* remove beacon and probe response */
                 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
+                RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
                 synchronize_rcu();
                 kfree(old_beacon);
+                kfree(old_probe_resp);
 
                 /* down all dependent devices, that is VLANs */
                 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,