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, 17 insertions, 16 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c
index 966858587e2..c9d90169ab1 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.c
@@ -62,8 +62,6 @@ static int iwl4965_hw_get_temperature(struct iwl_priv *priv);
 
 /* module parameters */
 static struct iwl_mod_params iwl4965_mod_params = {
-        .num_of_queues = IWL49_NUM_QUEUES,
-        .num_of_ampdu_queues = IWL49_NUM_AMPDU_QUEUES,
         .amsdu_size_8K = 1,
         .restart_fw = 1,
         /* the rest are 0 by default */
@@ -698,19 +696,16 @@ static void iwl4965_set_ct_threshold(struct iwl_priv *priv)
  */
 static int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
 {
+        if (priv->cfg->mod_params->num_of_queues >= IWL_MIN_NUM_QUEUES &&
+            priv->cfg->mod_params->num_of_queues <= IWL49_NUM_QUEUES)
+                priv->cfg->num_of_queues =
+                        priv->cfg->mod_params->num_of_queues;
 
-        if ((priv->cfg->mod_params->num_of_queues > IWL49_NUM_QUEUES) ||
-            (priv->cfg->mod_params->num_of_queues < IWL_MIN_NUM_QUEUES)) {
-                IWL_ERR(priv,
-                        "invalid queues_num, should be between %d and %d\n",
-                        IWL_MIN_NUM_QUEUES, IWL49_NUM_QUEUES);
-                return -EINVAL;
-        }
-
-        priv->hw_params.max_txq_num = priv->cfg->mod_params->num_of_queues;
+        priv->hw_params.max_txq_num = priv->cfg->num_of_queues;
         priv->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM;
         priv->hw_params.scd_bc_tbls_size =
-                        IWL49_NUM_QUEUES * sizeof(struct iwl4965_scd_bc_tbl);
+                        priv->cfg->num_of_queues *
+                        sizeof(struct iwl4965_scd_bc_tbl);
         priv->hw_params.tfd_size = sizeof(struct iwl_tfd);
         priv->hw_params.max_stations = IWL4965_STATION_COUNT;
         priv->hw_params.bcast_sta_id = IWL4965_BROADCAST_ID;
@@ -1739,11 +1734,13 @@ static int iwl4965_txq_agg_disable(struct iwl_priv *priv, u16 txq_id,
                                    u16 ssn_idx, u8 tx_fifo)
 {
         if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
-            (IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES <= txq_id)) {
+            (IWL49_FIRST_AMPDU_QUEUE + priv->cfg->num_of_ampdu_queues
+             <= txq_id)) {
                 IWL_WARN(priv,
                         "queue number out of range: %d, must be %d to %d\n",
                         txq_id, IWL49_FIRST_AMPDU_QUEUE,
-                        IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES - 1);
+                        IWL49_FIRST_AMPDU_QUEUE +
+                        priv->cfg->num_of_ampdu_queues - 1);
                 return -EINVAL;
         }
 
@@ -1804,11 +1801,13 @@ static int iwl4965_txq_agg_enable(struct iwl_priv *priv, int txq_id,
         u16 ra_tid;
 
         if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
-            (IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES <= txq_id)) {
+            (IWL49_FIRST_AMPDU_QUEUE + priv->cfg->num_of_ampdu_queues
+             <= txq_id)) {
                 IWL_WARN(priv,
                         "queue number out of range: %d, must be %d to %d\n",
                         txq_id, IWL49_FIRST_AMPDU_QUEUE,
-                        IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES - 1);
+                        IWL49_FIRST_AMPDU_QUEUE +
+                        priv->cfg->num_of_ampdu_queues - 1);
                 return -EINVAL;
         }
 
@@ -2286,6 +2285,8 @@ struct iwl_cfg iwl4965_agn_cfg = {
         .eeprom_ver = EEPROM_4965_EEPROM_VERSION,
         .eeprom_calib_ver = EEPROM_4965_TX_POWER_VERSION,
         .ops = &iwl4965_ops,
+        .num_of_queues = IWL49_NUM_QUEUES,
+        .num_of_ampdu_queues = IWL49_NUM_AMPDU_QUEUES,
         .mod_params = &iwl4965_mod_params,
         .use_isr_legacy = true,
         .ht_greenfield_support = false,