iwlagn: update write pointers in iwl_irq_tasklet()

Follow-up to "update write pointers for all tx queues after wakeup"; that
patch changed iwl_irq_tasklet_legacy(), but not iwl_irq_tasklet(), so
newer devices were not covered.

Comments from original patch:

Wakeup interrupt has been updating write pointers (indexes, actually) only
for tx queues 0-5.  This is adequate just for 3945, but inadequate for other
devices, all of which have more tx queues.  Now updating all tx/command queues,
so device can be aware of all new tx and host commands enqueued while
device was asleep.

This can potentially improve data traffic bandwidth and/or latency.

Signed-off-by: Ben Cahill <ben.m.cahill@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 6 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 2abd1f5b5eea..8198e14b8fad 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -1084,6 +1084,7 @@ static void iwl_irq_tasklet(struct iwl_priv *priv)
         u32 inta = 0;
         u32 handled = 0;
         unsigned long flags;
+        u32 i;
 #ifdef CONFIG_IWLWIFI_DEBUG
         u32 inta_mask;
 #endif
@@ -1194,12 +1195,8 @@ static void iwl_irq_tasklet(struct iwl_priv *priv)
         if (inta & CSR_INT_BIT_WAKEUP) {
                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
-                iwl_txq_update_write_ptr(priv, &priv->txq[0]);
-                iwl_txq_update_write_ptr(priv, &priv->txq[1]);
-                iwl_txq_update_write_ptr(priv, &priv->txq[2]);
-                iwl_txq_update_write_ptr(priv, &priv->txq[3]);
-                iwl_txq_update_write_ptr(priv, &priv->txq[4]);
-                iwl_txq_update_write_ptr(priv, &priv->txq[5]);
+                for (i = 0; i < priv->hw_params.max_txq_num; i++)
+                        iwl_txq_update_write_ptr(priv, &priv->txq[i]);
 
                 priv->isr_stats.wakeup++;