mac80211: allow drivers to request SM PS mode change
Sometimes drivers have more information than the
stack about how their antennas/chains are used,
and may require that the SM PS mode be changed.
This could happen, for example, when detecting
that the user disconnected an antenna. Thus this
patch introduces API to allow drivers to request
SM PS mode changes.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/ht.c b/net/mac80211/ht.c
index 9d101fb..11f74f5 100644
--- a/net/mac80211/ht.c
+++ b/net/mac80211/ht.c
@@ -265,3 +265,31 @@
return 0;
}
+
+void ieee80211_request_smps_work(struct work_struct *work)
+{
+ struct ieee80211_sub_if_data *sdata =
+ container_of(work, struct ieee80211_sub_if_data,
+ u.mgd.request_smps_work);
+
+ mutex_lock(&sdata->u.mgd.mtx);
+ __ieee80211_request_smps(sdata, sdata->u.mgd.driver_smps_mode);
+ mutex_unlock(&sdata->u.mgd.mtx);
+}
+
+void ieee80211_request_smps(struct ieee80211_vif *vif,
+ enum ieee80211_smps_mode smps_mode)
+{
+ struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+ if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
+ return;
+
+ if (WARN_ON(smps_mode == IEEE80211_SMPS_OFF))
+ smps_mode = IEEE80211_SMPS_AUTOMATIC;
+
+ ieee80211_queue_work(&sdata->local->hw,
+ &sdata->u.mgd.request_smps_work);
+}
+/* this might change ... don't want non-open drivers using it */
+EXPORT_SYMBOL_GPL(ieee80211_request_smps);
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 98e783c..1bf05bf 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -343,7 +343,10 @@
unsigned long timers_running; /* used for quiesce/restart */
bool powersave; /* powersave requested for this iface */
enum ieee80211_smps_mode req_smps, /* requested smps mode */
- ap_smps; /* smps mode AP thinks we're in */
+ ap_smps, /* smps mode AP thinks we're in */
+ driver_smps_mode; /* smps mode request */
+
+ struct work_struct request_smps_work;
unsigned int flags;
@@ -1113,6 +1116,7 @@
int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
enum ieee80211_smps_mode smps, const u8 *da,
const u8 *bssid);
+void ieee80211_request_smps_work(struct work_struct *work);
void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
u16 initiator, u16 reason);
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 82e7cec..38996a4 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1926,6 +1926,8 @@
* time -- the code here is properly synchronised.
*/
+ cancel_work_sync(&ifmgd->request_smps_work);
+
cancel_work_sync(&ifmgd->beacon_connection_loss_work);
if (del_timer_sync(&ifmgd->timer))
set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
@@ -1961,6 +1963,7 @@
INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
INIT_WORK(&ifmgd->beacon_connection_loss_work,
ieee80211_beacon_connection_loss_work);
+ INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
setup_timer(&ifmgd->timer, ieee80211_sta_timer,
(unsigned long) sdata);
setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,