From 508e32e177f54d1f6ebcfa181b9d6f2583c3b1c0 Mon Sep 17 00:00:00 2001 From: Reinette Chatre Date: Mon, 14 Apr 2008 21:16:13 -0700 Subject: [PATCH] iwlwifi: perform bss_info_changed post association work right away Do not use workqueue for bss_info_changed post association work. When driver is notified of association the upper layer will be notified right after that the association is complete. Doing the post association work in a workqueue introduces a race condition where the upper layer may want to make use of the association, but it is not yet complete. Signed-off-by: Reinette Chatre Acked-by: Tomas Winkler Signed-off-by: John W. Linville --- drivers/net/wireless/iwlwifi/iwl4965-base.c | 31 +++++++++++++++------ 1 file changed, 22 insertions(+), 9 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c index 9fb985770fd2..1f343409c904 100644 --- a/drivers/net/wireless/iwlwifi/iwl4965-base.c +++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c @@ -1840,7 +1840,7 @@ static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv, | RXON_FLG_CCK_MSK); priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK; } else { - /* Copied from iwl4965_bg_post_associate() */ + /* Copied from iwl4965_post_associate() */ if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK; else @@ -6004,10 +6004,8 @@ static void iwl4965_bg_rx_replenish(struct work_struct *data) #define IWL_DELAY_NEXT_SCAN (HZ*2) -static void iwl4965_bg_post_associate(struct work_struct *data) +static void iwl4965_post_associate(struct iwl_priv *priv) { - struct iwl_priv *priv = container_of(data, struct iwl_priv, - post_associate.work); struct ieee80211_conf *conf = NULL; int ret = 0; DECLARE_MAC_BUF(mac); @@ -6025,12 +6023,10 @@ static void iwl4965_bg_post_associate(struct work_struct *data) if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; - mutex_lock(&priv->mutex); - if (!priv->vif || !priv->is_open) { - mutex_unlock(&priv->mutex); + if (!priv->vif || !priv->is_open) return; - } + iwl4965_scan_cancel_timeout(priv, 200); conf = ieee80211_get_hw_conf(priv->hw); @@ -6114,7 +6110,18 @@ static void iwl4965_bg_post_associate(struct work_struct *data) /* we have just associated, don't start scan too early */ priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN; +} + + +static void iwl4965_bg_post_associate(struct work_struct *data) +{ + struct iwl_priv *priv = container_of(data, struct iwl_priv, + post_associate.work); + + mutex_lock(&priv->mutex); + iwl4965_post_associate(priv); mutex_unlock(&priv->mutex); + } static void iwl4965_bg_abort_scan(struct work_struct *work) @@ -6736,6 +6743,10 @@ static void iwl4965_bss_info_changed(struct ieee80211_hw *hw, if (changes & BSS_CHANGED_ASSOC) { IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc); + /* This should never happen as this function should + * never be called from interrupt context. */ + if (WARN_ON_ONCE(in_interrupt())) + return; if (bss_conf->assoc) { priv->assoc_id = bss_conf->aid; priv->beacon_int = bss_conf->beacon_int; @@ -6743,7 +6754,9 @@ static void iwl4965_bss_info_changed(struct ieee80211_hw *hw, priv->assoc_capability = bss_conf->assoc_capability; priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN_AFTER_ASSOC; - queue_work(priv->workqueue, &priv->post_associate.work); + mutex_lock(&priv->mutex); + iwl4965_post_associate(priv); + mutex_unlock(&priv->mutex); } else { priv->assoc_id = 0; IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc); -- 2.20.1