iwlwifi: optimize power saving
In hostap AP mode, every time the client sends the AP
a packet the STA_NOTIFY_AWAKE code is sent from mac80211.
This results in a command being sent to the uCode even if
the client was not asleep.
The following simple patch has fixed the issue for me without any
degradation that I can find.
Signed-off-by: Daniel Halperin <dhalperi@cs.washington.edu>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 4a26892..380d208 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -3007,6 +3007,8 @@
break;
case STA_NOTIFY_AWAKE:
WARN_ON(!sta_priv->client);
+ if (!sta_priv->asleep)
+ break;
sta_priv->asleep = false;
sta_id = iwl_find_station(priv, sta->addr);
if (sta_id != IWL_INVALID_STATION)