iwlwifi: Fix byte count table for fragmented packets

This patch fix byte count table update. Table must be updated for each
fragment

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>

drivers/net/wireless/iwlwifi/iwl-4965.c

@@ -3141,18 +3141,16 @@ static void iwl4965_hw_card_show_info(struct iwl_priv *priv)
 #define IWL_TX_DELIMITER_SIZE	4
 
 /**
- * iwl4965_tx_queue_update_wr_ptr - Set up entry in Tx byte-count array
+ * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
  */
-int iwl4965_tx_queue_update_wr_ptr(struct iwl_priv *priv,
-				   struct iwl4965_tx_queue *txq, u16 byte_cnt)
+static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
+					    struct iwl4965_tx_queue *txq,
+					    u16 byte_cnt)
 {
 	int len;
 	int txq_id = txq->q.id;
 	struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
 
-	if (txq->need_update == 0)
-		return 0;
-
 	len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
 
 	/* Set up byte count within first 256 entries */
@@ -3164,8 +3162,6 @@ int iwl4965_tx_queue_update_wr_ptr(struct iwl_priv *priv,
 		IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
 			tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
 			byte_cnt, len);
-
-	return 0;
 }
 
 /**
@@ -4934,6 +4930,7 @@ static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
 
 static struct iwl_lib_ops iwl4965_lib = {
 	.init_drv = iwl4965_init_drv,
+	.txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
 	.hw_nic_init = iwl4965_hw_nic_init,
 	.is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
 	.alive_notify = iwl4965_alive_notify,

drivers/net/wireless/iwlwifi/iwl-core.h

@@ -89,6 +89,10 @@ struct iwl_hcmd_utils_ops {
 struct iwl_lib_ops {
 	/* iwlwifi driver (priv) init */
 	int (*init_drv)(struct iwl_priv *priv);
+
+	void (*txq_update_byte_cnt_tbl)(struct iwl_priv *priv,
+					struct iwl4965_tx_queue *txq,
+					u16 byte_cnt);
 	/* nic init */
 	int (*hw_nic_init)(struct iwl_priv *priv);
 	/* alive notification */

drivers/net/wireless/iwlwifi/iwl4965-base.c

@@ -575,11 +575,11 @@ int iwl4965_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 	txq->need_update = 1;
 
 	/* Set up entry in queue's byte count circular buffer */
-	ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
+	priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, 0);
 
 	/* Increment and update queue's write index */
 	q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
-	iwl4965_tx_queue_update_write_ptr(priv, txq);
+	ret = iwl4965_tx_queue_update_write_ptr(priv, txq);
 
 	spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 	return ret ? ret : idx;
@@ -2392,7 +2392,7 @@ static int iwl4965_tx_skb(struct iwl_priv *priv,
 			   ieee80211_get_hdrlen(fc));
 
 	/* Set up entry for this TFD in Tx byte-count array */
-	iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
+	priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, len);
 
 	/* Tell device the write index *just past* this latest filled TFD */
 	q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);