Return-path: Received: from mail-wm0-f66.google.com ([74.125.82.66]:35036 "EHLO mail-wm0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934780AbdBQUyO (ORCPT ); Fri, 17 Feb 2017 15:54:14 -0500 Received: by mail-wm0-f66.google.com with SMTP id u63so4467348wmu.2 for ; Fri, 17 Feb 2017 12:54:13 -0800 (PST) From: Doru To: linux-wireless@vger.kernel.org, andra.paraschiv7@gmail.com, costin.raiciu@cs.pub.ro, dragos.niculescu@cs.pub.ro Cc: Doru Gucea Subject: [RFC PATCH 2/2 v2] ath9k_htc: Adjust beacon timers for power save Date: Fri, 17 Feb 2017 22:54:06 +0200 Message-Id: <1487364846-4675-1-git-send-email-gucea.doru@gmail.com> (sfid-20170217_215417_235029_DC65E7CE) Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Doru Gucea Each time we receive a beacon we need to adjust the hardware timers for next DTIM and next TBTT. Before this commit, the Power Save behaviour was incorrect. The scenario was: - STA receives a beacon from AP with TIM unset; - mac80211 layers puts the chip to sleep; - chip is woken up by mac80211's software timer reponsible for beacon miss after 7 * beacon_interval period. Normally the chip should sleep at most DTIM period. This commit configures hardware timers for waking up the chip correctly. More details on the wiki: https://github.com/doru91/linux-stable/wiki/Single-Interface-Power-Save Changelog v1: * moved beacon configuration call in the ath9k_htc driver Signed-off-by: Doru Gucea --- drivers/net/wireless/ath/ath9k/htc_drv_main.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c b/drivers/net/wireless/ath/ath9k/htc_drv_main.c index a553c91..5403399 100644 --- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c +++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c @@ -1518,6 +1518,10 @@ static void ath9k_htc_bss_info_changed(struct ieee80211_hw *hw, mutex_lock(&priv->mutex); ath9k_htc_ps_wakeup(priv); + /* adjust beacon timers */ + if (changed && BSS_CHANGED_BEACON_INFO) + ath9k_htc_beacon_config(priv, vif); + if (changed & BSS_CHANGED_ASSOC) { ath_dbg(common, CONFIG, "BSS Changed ASSOC %d\n", bss_conf->assoc); -- 1.9.1