---

yaml
---
r: 150001
b: refs/heads/master
c: 04fe203
h: refs/heads/master
i:
  149999: 2edf247
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8e30bc55de98c000b0b836cb42525c82f605f191
+refs/heads/master: 04fe20372e70685d9f15966216cdffd3795fe590

trunk/include/net/mac80211.h

@@ -517,7 +517,7 @@ struct ieee80211_rx_status {
  * Flags to define PHY configuration options
  *
  * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported)
- * @IEEE80211_CONF_PS: Enable 802.11 power save mode
+ * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only)
  */
 enum ieee80211_conf_flags {
 	IEEE80211_CONF_RADIOTAP		= (1<<0),
@@ -553,14 +553,26 @@ enum ieee80211_conf_changed {
  *
  * This struct indicates how the driver shall configure the hardware.
  *
+ * @flags: configuration flags defined above
+ *
  * @radio_enabled: when zero, driver is required to switch off the radio.
  * @beacon_int: beacon interval (TODO make interface config)
+ *
  * @listen_interval: listen interval in units of beacon interval
- * @flags: configuration flags defined above
+ * @max_sleep_interval: the maximum number of beacon intervals to sleep for
+ *	before checking the beacon for a TIM bit (managed mode only); this
+ *	value will be only achievable between DTIM frames, the hardware
+ *	needs to check for the multicast traffic bit in DTIM beacons.
+ *	This variable is valid only when the CONF_PS flag is set.
+ * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the
+ *	powersave documentation below. This variable is valid only when
+ *	the CONF_PS flag is set.
+ *
  * @power_level: requested transmit power (in dBm)
- * @dynamic_ps_timeout: dynamic powersave timeout (in ms)
+ *
  * @channel: the channel to tune to
  * @channel_type: the channel (HT) type
+ *
  * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame
  *    (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11,
  *    but actually means the number of transmissions not the number of retries
@@ -572,6 +584,7 @@ struct ieee80211_conf {
 	int beacon_int;
 	u32 flags;
 	int power_level, dynamic_ps_timeout;
+	int max_sleep_interval;
 
 	u16 listen_interval;
 	bool radio_enabled;

trunk/net/mac80211/mlme.c

@@ -545,10 +545,19 @@ void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
 		beaconint_us = ieee80211_tu_to_usec(
 					found->vif.bss_conf.beacon_int);
 
-		if (beaconint_us > latency)
+		if (beaconint_us > latency) {
 			local->ps_sdata = NULL;
-		else
+		} else {
+			u8 dtimper = found->vif.bss_conf.dtim_period;
+			int maxslp = 1;
+
+			if (dtimper > 1)
+				maxslp = min_t(int, dtimper,
+						    latency / beaconint_us);
+
+			local->hw.conf.max_sleep_interval = maxslp;
 			local->ps_sdata = found;
+		}
 	} else {
 		local->ps_sdata = NULL;
 	}
@@ -851,8 +860,11 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
 	ieee80211_bss_info_change_notify(sdata, bss_info_changed);
 
 	/* will be same as sdata */
-	if (local->ps_sdata)
-		ieee80211_enable_ps(local, sdata);
+	if (local->ps_sdata) {
+		mutex_lock(&local->iflist_mtx);
+		ieee80211_recalc_ps(local, -1);
+		mutex_unlock(&local->iflist_mtx);
+	}
 
 	netif_tx_start_all_queues(sdata->dev);
 	netif_carrier_on(sdata->dev);