iwlwifi: TX update chicken bits

This instructs FH to increment the retry count of a packet when
it is brought from the memory to TX-FIFO to save transactions
during aggregation flow.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c
index d73760c3f769..a738886b434f 100644
--- a/drivers/net/wireless/iwlwifi/iwl-5000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-5000.c
@@ -703,6 +703,7 @@ static int iwl5000_alive_notify(struct iwl_priv *priv)
         unsigned long flags;
         int ret;
         int i, chan;
+        u32 reg_val;
 
         spin_lock_irqsave(&priv->lock, flags);
 
@@ -732,6 +733,11 @@ static int iwl5000_alive_notify(struct iwl_priv *priv)
                                 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
                                 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE);
 
+        /* Update FH chicken bits */
+        reg_val = iwl_read_direct32(priv, FH_TX_CHICKEN_BITS_REG);
+        iwl_write_direct32(priv, FH_TX_CHICKEN_BITS_REG,
+                           reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN);
+
         iwl_write_prph(priv, IWL50_SCD_QUEUECHAIN_SEL,
                 IWL50_SCD_QUEUECHAIN_SEL_ALL(priv->hw_params.max_txq_num));
         iwl_write_prph(priv, IWL50_SCD_AGGR_SEL, 0);