Return-path: Received: from nbd.name ([46.4.11.11]:53593 "EHLO nbd.name" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750735Ab1IBXkj (ORCPT ); Fri, 2 Sep 2011 19:40:39 -0400 From: Felix Fietkau To: linux-wireless@vger.kernel.org Cc: linville@tuxdriver.com, mcgrof@qca.qualcomm.com, rmanohar@qca.qualcomm.com, shafi.wireless@gmail.com, vthiagar@qca.qualcomm.com Subject: [PATCH v13 3/5] ath9k: always call ath_reset from workqueue context Date: Sat, 3 Sep 2011 01:40:25 +0200 Message-Id: <1315006827-81443-3-git-send-email-nbd@openwrt.org> (sfid-20110903_014042_652746_0E69E4DF) In-Reply-To: <1315006827-81443-2-git-send-email-nbd@openwrt.org> References: <1315006827-81443-1-git-send-email-nbd@openwrt.org> <1315006827-81443-2-git-send-email-nbd@openwrt.org> Sender: linux-wireless-owner@vger.kernel.org List-ID: This makes it much easier to add further rework to avoid race conditions between reset and other work items. Move other functions to make ath_reset static. Signed-off-by: Felix Fietkau --- drivers/net/wireless/ath/ath9k/ath9k.h | 3 ++- drivers/net/wireless/ath/ath9k/beacon.c | 4 +--- drivers/net/wireless/ath/ath9k/init.c | 1 + drivers/net/wireless/ath/ath9k/main.c | 17 +++++++++++++---- drivers/net/wireless/ath/ath9k/xmit.c | 14 +++++++++----- 5 files changed, 26 insertions(+), 13 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h index 5d9a9aa..b2992d4 100644 --- a/drivers/net/wireless/ath/ath9k/ath9k.h +++ b/drivers/net/wireless/ath/ath9k/ath9k.h @@ -425,6 +425,7 @@ void ath9k_set_beaconing_status(struct ath_softc *sc, bool status); #define ATH_PAPRD_TIMEOUT 100 /* msecs */ +void ath_reset_work(struct work_struct *work); void ath_hw_check(struct work_struct *work); void ath_hw_pll_work(struct work_struct *work); void ath_paprd_calibrate(struct work_struct *work); @@ -604,6 +605,7 @@ struct ath_softc { struct mutex mutex; struct work_struct paprd_work; struct work_struct hw_check_work; + struct work_struct hw_reset_work; struct completion paprd_complete; unsigned int hw_busy_count; @@ -650,7 +652,6 @@ struct ath_softc { }; void ath9k_tasklet(unsigned long data); -int ath_reset(struct ath_softc *sc, bool retry_tx); int ath_cabq_update(struct ath_softc *); static inline void ath_read_cachesize(struct ath_common *common, int *csz) diff --git a/drivers/net/wireless/ath/ath9k/beacon.c b/drivers/net/wireless/ath/ath9k/beacon.c index 0c757c9..22e8e25 100644 --- a/drivers/net/wireless/ath/ath9k/beacon.c +++ b/drivers/net/wireless/ath/ath9k/beacon.c @@ -386,9 +386,7 @@ void ath_beacon_tasklet(unsigned long data) ath_dbg(common, ATH_DBG_BSTUCK, "beacon is officially stuck\n"); sc->sc_flags |= SC_OP_TSF_RESET; - spin_lock(&sc->sc_pcu_lock); - ath_reset(sc, true); - spin_unlock(&sc->sc_pcu_lock); + ieee80211_queue_work(sc->hw, &sc->hw_reset_work); } return; diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c index 50da642..be302fb 100644 --- a/drivers/net/wireless/ath/ath9k/init.c +++ b/drivers/net/wireless/ath/ath9k/init.c @@ -777,6 +777,7 @@ int ath9k_init_device(u16 devid, struct ath_softc *sc, goto error_world; } + INIT_WORK(&sc->hw_reset_work, ath_reset_work); INIT_WORK(&sc->hw_check_work, ath_hw_check); INIT_WORK(&sc->paprd_work, ath_paprd_calibrate); INIT_DELAYED_WORK(&sc->hw_pll_work, ath_hw_pll_work); diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index 9bb222c..9afcc66 100644 --- a/drivers/net/wireless/ath/ath9k/main.c +++ b/drivers/net/wireless/ath/ath9k/main.c @@ -236,6 +236,7 @@ static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw, del_timer_sync(&common->ani.timer); cancel_work_sync(&sc->paprd_work); cancel_work_sync(&sc->hw_check_work); + cancel_work_sync(&sc->hw_reset_work); cancel_delayed_work_sync(&sc->tx_complete_work); cancel_delayed_work_sync(&sc->hw_pll_work); @@ -608,9 +609,7 @@ void ath9k_tasklet(unsigned long data) if ((status & ATH9K_INT_FATAL) || (status & ATH9K_INT_BB_WATCHDOG)) { - spin_lock(&sc->sc_pcu_lock); - ath_reset(sc, true); - spin_unlock(&sc->sc_pcu_lock); + ieee80211_queue_work(sc->hw, &sc->hw_reset_work); return; } @@ -901,7 +900,7 @@ void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw) ath9k_ps_restore(sc); } -int ath_reset(struct ath_softc *sc, bool retry_tx) +static int ath_reset(struct ath_softc *sc, bool retry_tx) { struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); @@ -969,6 +968,15 @@ int ath_reset(struct ath_softc *sc, bool retry_tx) return r; } +void ath_reset_work(struct work_struct *work) +{ + struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work); + + spin_lock_bh(&sc->sc_pcu_lock); + ath_reset(sc, true); + spin_unlock_bh(&sc->sc_pcu_lock); +} + void ath_hw_check(struct work_struct *work) { struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work); @@ -1230,6 +1238,7 @@ static void ath9k_stop(struct ieee80211_hw *hw) cancel_delayed_work_sync(&sc->hw_pll_work); cancel_work_sync(&sc->paprd_work); cancel_work_sync(&sc->hw_check_work); + cancel_work_sync(&sc->hw_reset_work); if (sc->sc_flags & SC_OP_INVALID) { ath_dbg(common, ATH_DBG_ANY, "Device not present\n"); diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c index 49b93c2..782b0c9 100644 --- a/drivers/net/wireless/ath/ath9k/xmit.c +++ b/drivers/net/wireless/ath/ath9k/xmit.c @@ -582,7 +582,7 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq, rcu_read_unlock(); if (needreset) - ath_reset(sc, false); + ieee80211_queue_work(sc->hw, &sc->hw_reset_work); } static bool ath_lookup_legacy(struct ath_buf *bf) @@ -1332,7 +1332,7 @@ void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq) struct ath_atx_ac *ac, *ac_tmp, *last_ac; struct ath_atx_tid *tid, *last_tid; - if (list_empty(&txq->axq_acq) || + if (work_pending(&sc->hw_reset_work) || list_empty(&txq->axq_acq) || txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) return; @@ -2147,6 +2147,9 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq) spin_lock_bh(&txq->axq_lock); for (;;) { + if (work_pending(&sc->hw_reset_work)) + break; + if (list_empty(&txq->axq_q)) { txq->axq_link = NULL; if (sc->sc_flags & SC_OP_TXAGGR) @@ -2234,9 +2237,7 @@ static void ath_tx_complete_poll_work(struct work_struct *work) if (needreset) { ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_RESET, "tx hung, resetting the chip\n"); - spin_lock_bh(&sc->sc_pcu_lock); - ath_reset(sc, true); - spin_unlock_bh(&sc->sc_pcu_lock); + ieee80211_queue_work(sc->hw, &sc->hw_reset_work); } ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, @@ -2269,6 +2270,9 @@ void ath_tx_edma_tasklet(struct ath_softc *sc) int status; for (;;) { + if (work_pending(&sc->hw_reset_work)) + break; + status = ath9k_hw_txprocdesc(ah, NULL, (void *)&ts); if (status == -EINPROGRESS) break; -- 1.7.3.2