iwlwifi: Monitor and recover the aggregation TX flow failure

[safe/jmp/linux-2.6] / drivers / net / wireless / iwlwifi / iwl-agn.c

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 380d208..4157c6c 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -1757,7 +1757,7 @@ static const char *desc_lookup_text[] = {
        "DEBUG_1",
        "DEBUG_2",
        "DEBUG_3",
-       "UNKNOWN"
+       "ADVANCED SYSASSERT"
 };
 
 static const char *desc_lookup(int i)
@@ -2439,18 +2439,6 @@ static void iwl_bg_run_time_calib_work(struct work_struct *work)
        return;
 }
 
-static void iwl_bg_up(struct work_struct *data)
-{
-       struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
-
-       if (test_bit(STATUS_EXIT_PENDING, &priv->status))
-               return;
-
-       mutex_lock(&priv->mutex);
-       __iwl_up(priv);
-       mutex_unlock(&priv->mutex);
-}
-
 static void iwl_bg_restart(struct work_struct *data)
 {
        struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
@@ -2467,7 +2455,13 @@ static void iwl_bg_restart(struct work_struct *data)
                ieee80211_restart_hw(priv->hw);
        } else {
                iwl_down(priv);
-               queue_work(priv->workqueue, &priv->up);
+
+               if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+                       return;
+
+               mutex_lock(&priv->mutex);
+               __iwl_up(priv);
+               mutex_unlock(&priv->mutex);
        }
 }
 
@@ -2637,7 +2631,7 @@ static int iwl_mac_setup_register(struct iwl_priv *priv)
         */
        hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 
-       hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
+       hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX + 1;
        /* we create the 802.11 header and a zero-length SSID element */
        hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
 
@@ -2947,10 +2941,21 @@ static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
                        return ret;
        case IEEE80211_AMPDU_TX_START:
                IWL_DEBUG_HT(priv, "start Tx\n");
-               return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
+               ret = iwl_tx_agg_start(priv, sta->addr, tid, ssn);
+               if (ret == 0) {
+                       priv->agg_tids_count++;
+                       IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
+                               priv->agg_tids_count);
+               }
+               return ret;
        case IEEE80211_AMPDU_TX_STOP:
                IWL_DEBUG_HT(priv, "stop Tx\n");
                ret = iwl_tx_agg_stop(priv, sta->addr, tid);
+               if ((ret == 0) && (priv->agg_tids_count > 0)) {
+                       priv->agg_tids_count--;
+                       IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
+                               priv->agg_tids_count);
+               }
                if (test_bit(STATUS_EXIT_PENDING, &priv->status))
                        return 0;
                else
@@ -3285,7 +3290,6 @@ static void iwl_setup_deferred_work(struct iwl_priv *priv)
 
        init_waitqueue_head(&priv->wait_command_queue);
 
-       INIT_WORK(&priv->up, iwl_bg_up);
        INIT_WORK(&priv->restart, iwl_bg_restart);
        INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
        INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
@@ -3371,6 +3375,7 @@ static int iwl_init_drv(struct iwl_priv *priv)
        priv->iw_mode = NL80211_IFTYPE_STATION;
        priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
        priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
+       priv->agg_tids_count = 0;
 
        /* Choose which receivers/antennas to use */
        if (priv->cfg->ops->hcmd->set_rxon_chain)
@@ -3447,7 +3452,6 @@ static struct ieee80211_ops iwl_hw_ops = {
        .set_key = iwl_mac_set_key,
        .update_tkip_key = iwl_mac_update_tkip_key,
        .get_stats = iwl_mac_get_stats,
-       .get_tx_stats = iwl_mac_get_tx_stats,
        .conf_tx = iwl_mac_conf_tx,
        .reset_tsf = iwl_mac_reset_tsf,
        .bss_info_changed = iwl_bss_info_changed,
@@ -3548,6 +3552,14 @@ static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
         */
        spin_lock_init(&priv->reg_lock);
        spin_lock_init(&priv->lock);
+
+       /*
+        * stop and reset the on-board processor just in case it is in a
+        * strange state ... like being left stranded by a primary kernel
+        * and this is now the kdump kernel trying to start up
+        */
+       iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
+
        iwl_hw_detect(priv);
        IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
                priv->cfg->name, priv->hw_rev);