From: Doru <gucea.doru@gmail.com>
To: linux-wireless@vger.kernel.org, andra.paraschiv7@gmail.com,
costin.raiciu@cs.pub.ro, dragos.niculescu@cs.pub.ro
Cc: Doru Gucea <gucea.doru@gmail.com>
Subject: [PATCH 2/2] ath9k_htc: Adjust beacon timers for power save
Date: Wed, 15 Feb 2017 21:01:43 +0200 [thread overview]
Message-ID: <1487185303-8700-1-git-send-email-gucea.doru@gmail.com> (raw)
From: Doru Gucea <gucea.doru@gmail.com>
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
Signed-off-by: Doru Gucea <gucea.doru@gmail.com>
---
drivers/net/wireless/ath/ath9k/main.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index c27143b..d2934e1 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1749,6 +1749,10 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
ath9k_ps_wakeup(sc);
mutex_lock(&sc->mutex);
+ /* adjust beacon timers */
+ if (changed && BSS_CHANGED_BEACON_INFO)
+ ath9k_htc_beacon_config(priv, vif);
+
if (changed & BSS_CHANGED_ASSOC) {
ath_dbg(common, CONFIG, "BSSID %pM Changed ASSOC %d\n",
bss_conf->bssid, bss_conf->assoc);
--
1.9.1
next reply other threads:[~2017-02-15 19:01 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-15 19:01 Doru [this message]
2017-02-15 20:31 ` [PATCH 2/2] ath9k_htc: Adjust beacon timers for power save kbuild test robot
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