iwlwifi: add debug messages when start aggregation queue

This patch adding few more debug messages if encounter error when driver
try to start tx aggregation queue. Also change from IWL_ERR to
IWL_DEBUG_HT is the HW legacy queue is empty when driver request to move
to aggregation queue.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c
index 1f117a4..c734c5f 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-tx.c
@@ -1170,8 +1170,10 @@ int iwl_tx_agg_start(struct iwl_priv *priv, const u8 *ra, u16 tid, u16 *ssn)
                        __func__, ra, tid);
 
        sta_id = iwl_find_station(priv, ra);
-       if (sta_id == IWL_INVALID_STATION)
+       if (sta_id == IWL_INVALID_STATION) {
+               IWL_ERR(priv, "Start AGG on invalid station\n");
                return -ENXIO;
+       }
 
        if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) {
                IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
@@ -1179,8 +1181,10 @@ int iwl_tx_agg_start(struct iwl_priv *priv, const u8 *ra, u16 tid, u16 *ssn)
        }
 
        txq_id = iwl_txq_ctx_activate_free(priv);
-       if (txq_id == -1)
+       if (txq_id == -1) {
+               IWL_ERR(priv, "No free aggregation queue available\n");
                return -ENXIO;
+       }
 
        spin_lock_irqsave(&priv->sta_lock, flags);
        tid_data = &priv->stations[sta_id].tid[tid];
@@ -1194,7 +1198,7 @@ int iwl_tx_agg_start(struct iwl_priv *priv, const u8 *ra, u16 tid, u16 *ssn)
                return ret;
 
        if (tid_data->tfds_in_queue == 0) {
-               IWL_ERR(priv, "HW queue is empty\n");
+               IWL_DEBUG_HT(priv, "HW queue is empty\n");
                tid_data->agg.state = IWL_AGG_ON;
                ieee80211_start_tx_ba_cb_irqsafe(priv->hw, ra, tid);
        } else {