[1/9] iwlagn: use mutex for aggregation

Message ID	1277143600-32554-2-git-send-email-reinette.chatre@intel.com (mailing list archive)
State	Not Applicable, archived
Headers	show Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.4/8.14.3) with ESMTP id o5LI6nA1006935 for <patchwork-linux-wireless@patchwork.kernel.org>; Mon, 21 Jun 2010 18:07:30 GMT From: Reinette Chatre <reinette.chatre@intel.com> To: linville@tuxdriver.com Cc: linux-wireless@vger.kernel.org, ipw3945-devel@lists.sourceforge.net, Johannes Berg <johannes.berg@intel.com>, Reinette Chatre <reinette.chatre@intel.com> Subject: [PATCH 1/9] iwlagn: use mutex for aggregation Date: Mon, 21 Jun 2010 11:06:32 -0700 Message-Id: <1277143600-32554-2-git-send-email-reinette.chatre@intel.com> In-Reply-To: <1277143600-32554-1-git-send-email-reinette.chatre@intel.com> References: <1277143600-32554-1-git-send-email-reinette.chatre@intel.com> Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk

diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c index 83e6a42..fee276b 100644 --- a/drivers/net/wireless/iwlwifi/iwl-4965.c +++ b/drivers/net/wireless/iwlwifi/iwl-4965.c @@ -1785,6 +1785,7 @@ static int iwl4965_txq_agg_enable(struct iwl_priv *priv, int txq_id, { unsigned long flags; u16 ra_tid; + int ret; if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) || (IWL49_FIRST_AMPDU_QUEUE + priv->cfg->num_of_ampdu_queues @@ -1800,7 +1801,9 @@ static int iwl4965_txq_agg_enable(struct iwl_priv *priv, int txq_id, ra_tid = BUILD_RAxTID(sta_id, tid); /* Modify device's station table to Tx this TID */ - iwl_sta_tx_modify_enable_tid(priv, sta_id, tid); + ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid); + if (ret) + return ret; spin_lock_irqsave(&priv->lock, flags); diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c index 84df7fc..2573234 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c @@ -233,6 +233,7 @@ int iwlagn_txq_agg_enable(struct iwl_priv *priv, int txq_id, { unsigned long flags; u16 ra_tid; + int ret; if ((IWLAGN_FIRST_AMPDU_QUEUE > txq_id) || (IWLAGN_FIRST_AMPDU_QUEUE + priv->cfg->num_of_ampdu_queues @@ -248,7 +249,9 @@ int iwlagn_txq_agg_enable(struct iwl_priv *priv, int txq_id, ra_tid = BUILD_RAxTID(sta_id, tid); /* Modify device's station table to Tx this TID */ - iwl_sta_tx_modify_enable_tid(priv, sta_id, tid); + ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid); + if (ret) + return ret; spin_lock_irqsave(&priv->lock, flags); diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c index d857f84..294b7ed 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn.c @@ -3374,7 +3374,7 @@ static int iwl_mac_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_sta *sta, u16 tid, u16 *ssn) { struct iwl_priv *priv = hw->priv; - int ret; + int ret = -EINVAL; IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n", sta->addr, tid); @@ -3382,17 +3382,19 @@ static int iwl_mac_ampdu_action(struct ieee80211_hw *hw, if (!(priv->cfg->sku & IWL_SKU_N)) return -EACCES; + mutex_lock(&priv->mutex); + switch (action) { case IEEE80211_AMPDU_RX_START: IWL_DEBUG_HT(priv, "start Rx\n"); - return iwl_sta_rx_agg_start(priv, sta, tid, *ssn); + ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn); + break; case IEEE80211_AMPDU_RX_STOP: IWL_DEBUG_HT(priv, "stop Rx\n"); ret = iwl_sta_rx_agg_stop(priv, sta, tid); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) - return 0; - else - return ret; + ret = 0; + break; case IEEE80211_AMPDU_TX_START: IWL_DEBUG_HT(priv, "start Tx\n"); ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn); @@ -3401,7 +3403,7 @@ static int iwl_mac_ampdu_action(struct ieee80211_hw *hw, IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n", priv->_agn.agg_tids_count); } - return ret; + break; case IEEE80211_AMPDU_TX_STOP: IWL_DEBUG_HT(priv, "stop Tx\n"); ret = iwlagn_tx_agg_stop(priv, vif, sta, tid); @@ -3411,18 +3413,15 @@ static int iwl_mac_ampdu_action(struct ieee80211_hw *hw, priv->_agn.agg_tids_count); } if (test_bit(STATUS_EXIT_PENDING, &priv->status)) - return 0; - else - return ret; + ret = 0; + break; case IEEE80211_AMPDU_TX_OPERATIONAL: - /* do nothing */ - return -EOPNOTSUPP; - default: - IWL_DEBUG_HT(priv, "unknown\n"); - return -EINVAL; + /* do nothing, return value ignored */ break; } - return 0; + mutex_unlock(&priv->mutex); + + return ret; } static void iwl_mac_sta_notify(struct ieee80211_hw *hw, diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.c b/drivers/net/wireless/iwlwifi/iwl-sta.c index d57df6c..a62a032 100644 --- a/drivers/net/wireless/iwlwifi/iwl-sta.c +++ b/drivers/net/wireless/iwlwifi/iwl-sta.c @@ -30,6 +30,7 @@ #include <net/mac80211.h> #include <linux/etherdevice.h> #include <linux/sched.h> +#include <linux/lockdep.h> #include "iwl-dev.h" #include "iwl-core.h" @@ -145,8 +146,10 @@ int iwl_send_add_sta(struct iwl_priv *priv, if (flags & CMD_ASYNC) cmd.callback = iwl_add_sta_callback; - else + else { cmd.flags |= CMD_WANT_SKB; + might_sleep(); + } cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data); ret = iwl_send_cmd(priv, &cmd); @@ -1268,17 +1271,22 @@ EXPORT_SYMBOL_GPL(iwl_dealloc_bcast_station); /** * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table */ -void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid) +int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid) { unsigned long flags; + struct iwl_addsta_cmd sta_cmd; + + lockdep_assert_held(&priv->mutex); /* Remove "disable" flag, to enable Tx for this TID */ spin_lock_irqsave(&priv->sta_lock, flags); priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX; priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid)); priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; - iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC); + memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); spin_unlock_irqrestore(&priv->sta_lock, flags); + + return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); } EXPORT_SYMBOL(iwl_sta_tx_modify_enable_tid); @@ -1287,6 +1295,9 @@ int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta, { unsigned long flags; int sta_id; + struct iwl_addsta_cmd sta_cmd; + + lockdep_assert_held(&priv->mutex); sta_id = iwl_sta_id(sta); if (sta_id == IWL_INVALID_STATION) @@ -1298,10 +1309,10 @@ int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta, priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid; priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn); priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; + memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); spin_unlock_irqrestore(&priv->sta_lock, flags); - return iwl_send_add_sta(priv, &priv->stations[sta_id].sta, - CMD_ASYNC); + return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); } EXPORT_SYMBOL(iwl_sta_rx_agg_start); @@ -1309,7 +1320,10 @@ int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta, int tid) { unsigned long flags; - int sta_id, ret; + int sta_id; + struct iwl_addsta_cmd sta_cmd; + + lockdep_assert_held(&priv->mutex); sta_id = iwl_sta_id(sta); if (sta_id == IWL_INVALID_STATION) { @@ -1322,11 +1336,10 @@ int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta, priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK; priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid; priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; - ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC); + memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); spin_unlock_irqrestore(&priv->sta_lock, flags); - return ret; - + return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); } EXPORT_SYMBOL(iwl_sta_rx_agg_stop); diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.h b/drivers/net/wireless/iwlwifi/iwl-sta.h index 5b1b1e4..619bb99 100644 --- a/drivers/net/wireless/iwlwifi/iwl-sta.h +++ b/drivers/net/wireless/iwlwifi/iwl-sta.h @@ -73,7 +73,7 @@ int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id, const u8 *addr); int iwl_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta); -void iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid); +int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid); int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta, int tid, u16 ssn); int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,

[1/9] iwlagn: use mutex for aggregation

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