From 548db54cc1890b161e87d4ca1028cf77f51fd16c Mon Sep 17 00:00:00 2001 From: Michal Kazior Date: Fri, 5 Jul 2013 16:15:15 +0300 Subject: [PATCH] ath10k: improve locking Add more lockdep asserts and a few conf_mutex locks. It's better to be on the safe side. Signed-off-by: Michal Kazior Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath10k/mac.c | 57 ++++++++++++++++++++++++++- 1 file changed, 55 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index f91701c6963c..278c9689ce7a 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -43,6 +43,8 @@ static int ath10k_send_key(struct ath10k_vif *arvif, .macaddr = macaddr, }; + lockdep_assert_held(&arvif->ar->conf_mutex); + if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) arg.key_flags = WMI_KEY_PAIRWISE; else @@ -87,6 +89,8 @@ static int ath10k_install_key(struct ath10k_vif *arvif, struct ath10k *ar = arvif->ar; int ret; + lockdep_assert_held(&ar->conf_mutex); + INIT_COMPLETION(ar->install_key_done); ret = ath10k_send_key(arvif, key, cmd, macaddr); @@ -372,6 +376,8 @@ static inline int ath10k_vdev_setup_sync(struct ath10k *ar) { int ret; + lockdep_assert_held(&ar->conf_mutex); + ret = wait_for_completion_timeout(&ar->vdev_setup_done, ATH10K_VDEV_SETUP_TIMEOUT_HZ); if (ret == 0) @@ -605,6 +611,8 @@ static void ath10k_control_beaconing(struct ath10k_vif *arvif, { int ret = 0; + lockdep_assert_held(&arvif->ar->conf_mutex); + if (!info->enable_beacon) { ath10k_vdev_stop(arvif); return; @@ -631,6 +639,8 @@ static void ath10k_control_ibss(struct ath10k_vif *arvif, { int ret = 0; + lockdep_assert_held(&arvif->ar->conf_mutex); + if (!info->ibss_joined) { ret = ath10k_peer_delete(arvif->ar, arvif->vdev_id, self_peer); if (ret) @@ -680,6 +690,8 @@ static void ath10k_ps_iter(void *data, u8 *mac, struct ieee80211_vif *vif) enum wmi_sta_ps_mode psmode; int ret; + lockdep_assert_held(&arvif->ar->conf_mutex); + if (vif->type != NL80211_IFTYPE_STATION) return; @@ -722,6 +734,8 @@ static void ath10k_peer_assoc_h_basic(struct ath10k *ar, struct ieee80211_bss_conf *bss_conf, struct wmi_peer_assoc_complete_arg *arg) { + lockdep_assert_held(&ar->conf_mutex); + memcpy(arg->addr, sta->addr, ETH_ALEN); arg->vdev_id = arvif->vdev_id; arg->peer_aid = sta->aid; @@ -764,6 +778,8 @@ static void ath10k_peer_assoc_h_crypto(struct ath10k *ar, const u8 *rsnie = NULL; const u8 *wpaie = NULL; + lockdep_assert_held(&ar->conf_mutex); + bss = cfg80211_get_bss(ar->hw->wiphy, ar->hw->conf.chandef.chan, info->bssid, NULL, 0, 0, 0); if (bss) { @@ -804,6 +820,8 @@ static void ath10k_peer_assoc_h_rates(struct ath10k *ar, u32 ratemask; int i; + lockdep_assert_held(&ar->conf_mutex); + sband = ar->hw->wiphy->bands[ar->hw->conf.chandef.chan->band]; ratemask = sta->supp_rates[ar->hw->conf.chandef.chan->band]; rates = sband->bitrates; @@ -827,6 +845,8 @@ static void ath10k_peer_assoc_h_ht(struct ath10k *ar, int smps; int i, n; + lockdep_assert_held(&ar->conf_mutex); + if (!ht_cap->ht_supported) return; @@ -905,6 +925,8 @@ static void ath10k_peer_assoc_h_qos_ap(struct ath10k *ar, u32 uapsd = 0; u32 max_sp = 0; + lockdep_assert_held(&ar->conf_mutex); + if (sta->wme) arg->peer_flags |= WMI_PEER_QOS; @@ -1056,6 +1078,8 @@ static int ath10k_peer_assoc(struct ath10k *ar, { struct wmi_peer_assoc_complete_arg arg; + lockdep_assert_held(&ar->conf_mutex); + memset(&arg, 0, sizeof(struct wmi_peer_assoc_complete_arg)); ath10k_peer_assoc_h_basic(ar, arvif, sta, bss_conf, &arg); @@ -1079,6 +1103,8 @@ static void ath10k_bss_assoc(struct ieee80211_hw *hw, struct ieee80211_sta *ap_sta; int ret; + lockdep_assert_held(&ar->conf_mutex); + rcu_read_lock(); ap_sta = ieee80211_find_sta(vif, bss_conf->bssid); @@ -1119,6 +1145,8 @@ static void ath10k_bss_disassoc(struct ieee80211_hw *hw, struct ath10k_vif *arvif = ath10k_vif_to_arvif(vif); int ret; + lockdep_assert_held(&ar->conf_mutex); + /* * For some reason, calling VDEV-DOWN before VDEV-STOP * makes the FW to send frames via HTT after disassociation. @@ -1152,6 +1180,8 @@ static int ath10k_station_assoc(struct ath10k *ar, struct ath10k_vif *arvif, { int ret = 0; + lockdep_assert_held(&ar->conf_mutex); + ret = ath10k_peer_assoc(ar, arvif, sta, NULL); if (ret) { ath10k_warn("WMI peer assoc failed for %pM\n", sta->addr); @@ -1172,6 +1202,8 @@ static int ath10k_station_disassoc(struct ath10k *ar, struct ath10k_vif *arvif, { int ret = 0; + lockdep_assert_held(&ar->conf_mutex); + ret = ath10k_clear_peer_keys(arvif, sta->addr); if (ret) { ath10k_warn("could not clear all peer wep keys (%d)\n", ret); @@ -1198,6 +1230,8 @@ static int ath10k_update_channel_list(struct ath10k *ar) int ret; int i; + lockdep_assert_held(&ar->conf_mutex); + bands = hw->wiphy->bands; for (band = 0; band < IEEE80211_NUM_BANDS; band++) { if (!bands[band]) @@ -1284,6 +1318,8 @@ static void ath10k_reg_notifier(struct wiphy *wiphy, struct ath10k *ar = hw->priv; int ret; + mutex_lock(&ar->conf_mutex); + ath_reg_notifier_apply(wiphy, request, &ar->ath_common.regulatory); ret = ath10k_update_channel_list(ar); @@ -1301,6 +1337,8 @@ static void ath10k_reg_notifier(struct wiphy *wiphy, regpair->reg_5ghz_ctl); if (ret) ath10k_warn("could not set pdev regdomain (%d)\n", ret); + + mutex_unlock(&ar->conf_mutex); } /***************/ @@ -1678,6 +1716,8 @@ static int ath10k_start(struct ieee80211_hw *hw) struct ath10k *ar = hw->priv; int ret; + mutex_lock(&ar->conf_mutex); + ret = ath10k_wmi_pdev_set_param(ar, WMI_PDEV_PARAM_PMF_QOS, 1); if (ret) ath10k_warn("could not enable WMI_PDEV_PARAM_PMF_QOS (%d)\n", @@ -1688,6 +1728,7 @@ static int ath10k_start(struct ieee80211_hw *hw) ath10k_warn("could not init WMI_PDEV_PARAM_DYNAMIC_BW (%d)\n", ret); + mutex_unlock(&ar->conf_mutex); return 0; } @@ -1695,9 +1736,11 @@ static void ath10k_stop(struct ieee80211_hw *hw) { struct ath10k *ar = hw->priv; - /* avoid leaks in case FW never confirms scan for offchannel */ - cancel_work_sync(&ar->offchan_tx_work); + mutex_lock(&ar->conf_mutex); ath10k_offchan_tx_purge(ar); + mutex_unlock(&ar->conf_mutex); + + cancel_work_sync(&ar->offchan_tx_work); } static int ath10k_config(struct ieee80211_hw *hw, u32 changed) @@ -2381,6 +2424,8 @@ static int ath10k_conf_tx_uapsd(struct ath10k *ar, struct ieee80211_vif *vif, u32 value = 0; int ret = 0; + lockdep_assert_held(&ar->conf_mutex); + if (arvif->vdev_type != WMI_VDEV_TYPE_STA) return 0; @@ -2576,6 +2621,8 @@ static void ath10k_set_rts_iter(void *data, u8 *mac, struct ieee80211_vif *vif) struct ath10k_vif *arvif = ath10k_vif_to_arvif(vif); u32 rts = ar_iter->ar->hw->wiphy->rts_threshold; + lockdep_assert_held(&arvif->ar->conf_mutex); + rts = min_t(u32, rts, ATH10K_RTS_MAX); ar_iter->ret = ath10k_wmi_vdev_set_param(ar_iter->ar, arvif->vdev_id, @@ -2614,6 +2661,8 @@ static void ath10k_set_frag_iter(void *data, u8 *mac, struct ieee80211_vif *vif) u32 frag = ar_iter->ar->hw->wiphy->frag_threshold; int ret; + lockdep_assert_held(&arvif->ar->conf_mutex); + frag = clamp_t(u32, frag, ATH10K_FRAGMT_THRESHOLD_MIN, ATH10K_FRAGMT_THRESHOLD_MAX); @@ -2659,6 +2708,8 @@ static void ath10k_flush(struct ieee80211_hw *hw, u32 queues, bool drop) if (drop) return; + mutex_lock(&ar->conf_mutex); + ret = wait_event_timeout(ar->htt.empty_tx_wq, ({ bool empty; spin_lock_bh(&ar->htt.tx_lock); @@ -2669,6 +2720,8 @@ static void ath10k_flush(struct ieee80211_hw *hw, u32 queues, bool drop) }), ATH10K_FLUSH_TIMEOUT_HZ); if (ret <= 0) ath10k_warn("tx not flushed\n"); + + mutex_unlock(&ar->conf_mutex); } /* TODO: Implement this function properly -- 2.20.1