iwlwifi: dynamic allocate tx queue structure

Instead of always allocate the max number of tx queue structure,
use dynamic allocation based on the number of queues in device
configuration. With these changes, device does not have to allocate more
memory than the h/w can support.

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>

1 files changed, 16 insertions, 6 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c
index c832ba085db..625da63d01e 100644
--- a/drivers/net/wireless/iwlwifi/iwl-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-tx.c
@@ -405,15 +405,19 @@ void iwl_hw_txq_ctx_free(struct iwl_priv *priv)
         int txq_id;
 
         /* Tx queues */
-        for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++)
-                if (txq_id == IWL_CMD_QUEUE_NUM)
-                        iwl_cmd_queue_free(priv);
-                else
-                        iwl_tx_queue_free(priv, txq_id);
-
+        if (priv->txq)
+                for (txq_id = 0; txq_id < priv->hw_params.max_txq_num;
+                     txq_id++)
+                        if (txq_id == IWL_CMD_QUEUE_NUM)
+                                iwl_cmd_queue_free(priv);
+                        else
+                                iwl_tx_queue_free(priv, txq_id);
         iwl_free_dma_ptr(priv, &priv->kw);
 
         iwl_free_dma_ptr(priv, &priv->scd_bc_tbls);
+
+        /* free tx queue structure */
+        iwl_free_txq_mem(priv);
 }
 EXPORT_SYMBOL(iwl_hw_txq_ctx_free);
 
@@ -445,6 +449,12 @@ int iwl_txq_ctx_reset(struct iwl_priv *priv)
                 IWL_ERR(priv, "Keep Warm allocation failed\n");
                 goto error_kw;
         }
+
+        /* allocate tx queue structure */
+        ret = iwl_alloc_txq_mem(priv);
+        if (ret)
+                goto error;
+
         spin_lock_irqsave(&priv->lock, flags);
 
         /* Turn off all Tx DMA fifos */