Return-path: Received: from mail.atheros.com ([12.19.149.2]:53537 "EHLO mail.atheros.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754801Ab0J3Qfa (ORCPT ); Sat, 30 Oct 2010 12:35:30 -0400 Received: from mail.atheros.com ([10.10.20.105]) by sidewinder.atheros.com for ; Sat, 30 Oct 2010 09:35:19 -0700 From: Vivek Natarajan To: CC: , Johannes Berg Subject: [PATCH] ath9k: Fix a DMA latency issue for Intel Pinetrail platforms. Date: Sat, 30 Oct 2010 22:05:13 +0530 Message-ID: <1288456513-2617-1-git-send-email-vnatarajan@atheros.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-wireless-owner@vger.kernel.org List-ID: Throughput was severely affected in Intel Pinetrail platforms because of a DMA problem in C3 state. This patch fixes this issue. Signed-off-by: Vivek Natarajan CC: Johannes Berg --- drivers/net/wireless/ath/ath9k/ath9k.h | 1 + drivers/net/wireless/ath/ath9k/init.c | 8 ++++++++ drivers/net/wireless/ath/ath9k/main.c | 5 +++++ 3 files changed, 14 insertions(+), 0 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h index 973c919..04a9c86 100644 --- a/drivers/net/wireless/ath/ath9k/ath9k.h +++ b/drivers/net/wireless/ath/ath9k/ath9k.h @@ -675,6 +675,7 @@ static inline void ath_read_cachesize(struct ath_common *common, int *csz) } extern struct ieee80211_ops ath9k_ops; +extern struct pm_qos_request_list ath9k_pm_qos_req; extern int modparam_nohwcrypt; extern int led_blink; diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c index 95b41db..6a0d99e 100644 --- a/drivers/net/wireless/ath/ath9k/init.c +++ b/drivers/net/wireless/ath/ath9k/init.c @@ -15,6 +15,7 @@ */ #include +#include #include "ath9k.h" @@ -179,6 +180,8 @@ static const struct ath_ops ath9k_common_ops = { .write = ath9k_iowrite32, }; +struct pm_qos_request_list ath9k_pm_qos_req; + /**************************/ /* Initialization */ /**************************/ @@ -756,6 +759,9 @@ int ath9k_init_device(u16 devid, struct ath_softc *sc, u16 subsysid, ath_init_leds(sc); ath_start_rfkill_poll(sc); + pm_qos_add_request(&ath9k_pm_qos_req, PM_QOS_CPU_DMA_LATENCY, + PM_QOS_DEFAULT_VALUE); + return 0; error_world: @@ -811,6 +817,8 @@ void ath9k_deinit_device(struct ath_softc *sc) ath9k_ps_wakeup(sc); + pm_qos_remove_request(&ath9k_pm_qos_req); + wiphy_rfkill_stop_polling(sc->hw->wiphy); ath_deinit_leds(sc); diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index c6ec800..81fa245 100644 --- a/drivers/net/wireless/ath/ath9k/main.c +++ b/drivers/net/wireless/ath/ath9k/main.c @@ -15,6 +15,7 @@ */ #include +#include #include "ath9k.h" #include "btcoex.h" @@ -1213,6 +1214,8 @@ static int ath9k_start(struct ieee80211_hw *hw) ath9k_btcoex_timer_resume(sc); } + pm_qos_update_request(&ath9k_pm_qos_req, 55); + mutex_unlock: mutex_unlock(&sc->mutex); @@ -1388,6 +1391,8 @@ static void ath9k_stop(struct ieee80211_hw *hw) sc->sc_flags |= SC_OP_INVALID; + pm_qos_update_request(&ath9k_pm_qos_req, PM_QOS_DEFAULT_VALUE); + mutex_unlock(&sc->mutex); ath_print(common, ATH_DBG_CONFIG, "Driver halt\n"); -- 1.6.3.3