From 141b38b6bc6db69348a9eaed87137451240bc55f Mon Sep 17 00:00:00 2001 From: Sujith Date: Wed, 4 Feb 2009 08:10:07 +0530 Subject: [PATCH] ath9k: Lock mac80211 callbacks with a mutex Signed-off-by: Sujith Signed-off-by: John W. Linville --- drivers/net/wireless/ath9k/main.c | 60 +++++++++++++++++++++++-------- 1 file changed, 46 insertions(+), 14 deletions(-) diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c index 1c0f893e1c0a..9b040bacab10 100644 --- a/drivers/net/wireless/ath9k/main.c +++ b/drivers/net/wireless/ath9k/main.c @@ -1938,6 +1938,8 @@ static int ath9k_start(struct ieee80211_hw *hw) DPRINTF(sc, ATH_DBG_CONFIG, "Starting driver with " "initial channel: %d MHz\n", curchan->center_freq); + mutex_lock(&sc->mutex); + /* setup initial channel */ pos = curchan->hw_value; @@ -1963,7 +1965,7 @@ static int ath9k_start(struct ieee80211_hw *hw) "(freq %u MHz)\n", r, curchan->center_freq); spin_unlock_bh(&sc->sc_resetlock); - return r; + goto mutex_unlock; } spin_unlock_bh(&sc->sc_resetlock); @@ -1983,7 +1985,8 @@ static int ath9k_start(struct ieee80211_hw *hw) if (ath_startrecv(sc) != 0) { DPRINTF(sc, ATH_DBG_FATAL, "Unable to start recv logic\n"); - return -EIO; + r = -EIO; + goto mutex_unlock; } /* Setup our intr mask. */ @@ -2010,6 +2013,10 @@ static int ath9k_start(struct ieee80211_hw *hw) #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE) r = ath_start_rfkill_poll(sc); #endif + +mutex_unlock: + mutex_unlock(&sc->mutex); + return r; } @@ -2074,7 +2081,7 @@ static void ath9k_stop(struct ieee80211_hw *hw) return; } - DPRINTF(sc, ATH_DBG_CONFIG, "Cleaning up\n"); + mutex_lock(&sc->mutex); ieee80211_stop_queues(sc->hw); @@ -2099,6 +2106,8 @@ static void ath9k_stop(struct ieee80211_hw *hw) sc->sc_flags |= SC_OP_INVALID; + mutex_unlock(&sc->mutex); + DPRINTF(sc, ATH_DBG_CONFIG, "Driver halt\n"); } @@ -2114,6 +2123,8 @@ static int ath9k_add_interface(struct ieee80211_hw *hw, if (sc->sc_nvaps) return -ENOBUFS; + mutex_lock(&sc->mutex); + switch (conf->type) { case NL80211_IFTYPE_STATION: ic_opmode = NL80211_IFTYPE_STATION; @@ -2173,6 +2184,8 @@ static int ath9k_add_interface(struct ieee80211_hw *hw, jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL)); } + mutex_unlock(&sc->mutex); + return 0; } @@ -2184,6 +2197,8 @@ static void ath9k_remove_interface(struct ieee80211_hw *hw, DPRINTF(sc, ATH_DBG_CONFIG, "Detach Interface\n"); + mutex_lock(&sc->mutex); + /* Stop ANI */ del_timer_sync(&sc->sc_ani.timer); @@ -2198,6 +2213,8 @@ static void ath9k_remove_interface(struct ieee80211_hw *hw, sc->sc_vaps[0] = NULL; sc->sc_nvaps--; + + mutex_unlock(&sc->mutex); } static int ath9k_config(struct ieee80211_hw *hw, u32 changed) @@ -2206,6 +2223,7 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed) struct ieee80211_conf *conf = &hw->conf; mutex_lock(&sc->mutex); + if (changed & IEEE80211_CONF_CHANGE_PS) { if (conf->flags & IEEE80211_CONF_PS) { if ((sc->sc_imask & ATH9K_INT_TIM_TIMER) == 0) { @@ -2250,6 +2268,7 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed) sc->sc_config.txpowlimit = 2 * conf->power_level; mutex_unlock(&sc->mutex); + return 0; } @@ -2392,8 +2411,7 @@ static void ath9k_sta_notify(struct ieee80211_hw *hw, } } -static int ath9k_conf_tx(struct ieee80211_hw *hw, - u16 queue, +static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue, const struct ieee80211_tx_queue_params *params) { struct ath_softc *sc = hw->priv; @@ -2403,6 +2421,8 @@ static int ath9k_conf_tx(struct ieee80211_hw *hw, if (queue >= WME_NUM_AC) return 0; + mutex_lock(&sc->mutex); + qi.tqi_aifs = params->aifs; qi.tqi_cwmin = params->cw_min; qi.tqi_cwmax = params->cw_max; @@ -2419,6 +2439,8 @@ static int ath9k_conf_tx(struct ieee80211_hw *hw, if (ret) DPRINTF(sc, ATH_DBG_FATAL, "TXQ Update failed\n"); + mutex_unlock(&sc->mutex); + return ret; } @@ -2431,6 +2453,7 @@ static int ath9k_set_key(struct ieee80211_hw *hw, struct ath_softc *sc = hw->priv; int ret = 0; + mutex_lock(&sc->mutex); ath9k_ps_wakeup(sc); DPRINTF(sc, ATH_DBG_KEYCACHE, "Set HW Key\n"); @@ -2456,6 +2479,8 @@ static int ath9k_set_key(struct ieee80211_hw *hw, } ath9k_ps_restore(sc); + mutex_unlock(&sc->mutex); + return ret; } @@ -2466,6 +2491,8 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw, { struct ath_softc *sc = hw->priv; + mutex_lock(&sc->mutex); + if (changed & BSS_CHANGED_ERP_PREAMBLE) { DPRINTF(sc, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n", bss_conf->use_short_preamble); @@ -2490,15 +2517,18 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw, bss_conf->assoc); ath9k_bss_assoc_info(sc, vif, bss_conf); } + + mutex_unlock(&sc->mutex); } static u64 ath9k_get_tsf(struct ieee80211_hw *hw) { u64 tsf; struct ath_softc *sc = hw->priv; - struct ath_hal *ah = sc->sc_ah; - tsf = ath9k_hw_gettsf64(ah); + mutex_lock(&sc->mutex); + tsf = ath9k_hw_gettsf64(sc->sc_ah); + mutex_unlock(&sc->mutex); return tsf; } @@ -2506,23 +2536,25 @@ static u64 ath9k_get_tsf(struct ieee80211_hw *hw) static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf) { struct ath_softc *sc = hw->priv; - struct ath_hal *ah = sc->sc_ah; - ath9k_hw_settsf64(ah, tsf); + mutex_lock(&sc->mutex); + ath9k_hw_settsf64(sc->sc_ah, tsf); + mutex_unlock(&sc->mutex); } static void ath9k_reset_tsf(struct ieee80211_hw *hw) { struct ath_softc *sc = hw->priv; - struct ath_hal *ah = sc->sc_ah; - ath9k_hw_reset_tsf(ah); + mutex_lock(&sc->mutex); + ath9k_hw_reset_tsf(sc->sc_ah); + mutex_unlock(&sc->mutex); } static int ath9k_ampdu_action(struct ieee80211_hw *hw, - enum ieee80211_ampdu_mlme_action action, - struct ieee80211_sta *sta, - u16 tid, u16 *ssn) + enum ieee80211_ampdu_mlme_action action, + struct ieee80211_sta *sta, + u16 tid, u16 *ssn) { struct ath_softc *sc = hw->priv; int ret = 0;