iwlwifi: make iwl_tx_queue->tfds void*

Instead of having both tfds and tfds39, we can just have a void *tfds.
It makes the tx_queue structure nicer, and the code cleaner. It also helps
with further TX queues management code merging.
Signed-off-by: NSamuel Ortiz <samuel.ortiz@intel.com>
Signed-off-by: NReinette Chatre <reinette.chatre@intel.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-3945.c

@@ -730,10 +730,11 @@ int iwl3945_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 {
 	int count;
 	struct iwl_queue *q;
-	struct iwl3945_tfd *tfd;
+	struct iwl3945_tfd *tfd, *tfd_tmp;
 
 	q = &txq->q;
-	tfd = &txq->tfds39[q->write_ptr];
+	tfd_tmp = (struct iwl3945_tfd *)txq->tfds;
+	tfd = &tfd_tmp[q->write_ptr];
 
 	if (reset)
 		memset(tfd, 0, sizeof(*tfd));
@@ -764,7 +765,7 @@ int iwl3945_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
  */
 void iwl3945_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 {
-	struct iwl3945_tfd *tfd_tmp = (struct iwl3945_tfd *)&txq->tfds39[0];
+	struct iwl3945_tfd *tfd_tmp = (struct iwl3945_tfd *)txq->tfds;
 	struct iwl3945_tfd *tfd = &tfd_tmp[txq->q.read_ptr];
 	struct pci_dev *dev = priv->pci_dev;
 	int i;

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

@@ -520,7 +520,7 @@ static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
  */
 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 {
-	struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)&txq->tfds[0];
+	struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 	struct iwl_tfd *tfd;
 	struct pci_dev *dev = priv->pci_dev;
 	int index = txq->q.read_ptr;
@@ -563,11 +563,12 @@ int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 				 u8 reset, u8 pad)
 {
 	struct iwl_queue *q;
-	struct iwl_tfd *tfd;
+	struct iwl_tfd *tfd, *tfd_tmp;
 	u32 num_tbs;
 
 	q = &txq->q;
-	tfd = &txq->tfds[q->write_ptr];
+	tfd_tmp = (struct iwl_tfd *)txq->tfds;
+	tfd = &tfd_tmp[q->write_ptr];
 
 	if (reset)
 		memset(tfd, 0, sizeof(*tfd));

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

@@ -149,8 +149,7 @@ struct iwl_tx_info {
 
 struct iwl_tx_queue {
 	struct iwl_queue q;
-	struct iwl_tfd *tfds;
-	struct iwl3945_tfd *tfds39;
+	void *tfds;
 	struct iwl_cmd *cmd[TFD_TX_CMD_SLOTS];
 	struct iwl_tx_info *txb;
 	u8 need_update;

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

@@ -295,12 +295,12 @@ static int iwl_tx_queue_alloc(struct iwl_priv *priv,
 	/* Circular buffer of transmit frame descriptors (TFDs),
 	 * shared with device */
 	txq->tfds = pci_alloc_consistent(dev,
-			sizeof(txq->tfds[0]) * TFD_QUEUE_SIZE_MAX,
+			sizeof(struct iwl_tfd) * TFD_QUEUE_SIZE_MAX,
 			&txq->q.dma_addr);
 
 	if (!txq->tfds) {
 		IWL_ERR(priv, "pci_alloc_consistent(%zd) failed\n",
-			  sizeof(txq->tfds[0]) * TFD_QUEUE_SIZE_MAX);
+			  sizeof(struct iwl_tfd) * TFD_QUEUE_SIZE_MAX);
 		goto error;
 	}
 	txq->q.id = id;

drivers/net/wireless/iwlwifi/iwl3945-base.c

@@ -172,13 +172,13 @@ static int iwl3945_tx_queue_alloc(struct iwl_priv *priv,
 
 	/* Circular buffer of transmit frame descriptors (TFDs),
 	 * shared with device */
-	txq->tfds39 = pci_alloc_consistent(dev,
-			sizeof(txq->tfds39[0]) * TFD_QUEUE_SIZE_MAX,
-			&txq->q.dma_addr);
+	txq->tfds = pci_alloc_consistent(dev,
+				sizeof(struct iwl3945_tfd) * TFD_QUEUE_SIZE_MAX,
+				&txq->q.dma_addr);
 
-	if (!txq->tfds39) {
+	if (!txq->tfds) {
 		IWL_ERR(priv, "pci_alloc_consistent(%zd) failed\n",
-			  sizeof(txq->tfds39[0]) * TFD_QUEUE_SIZE_MAX);
+			  sizeof(struct iwl3945_tfd) * TFD_QUEUE_SIZE_MAX);
 		goto error;
 	}
 	txq->q.id = id;
@@ -287,7 +287,7 @@ void iwl3945_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 	/* De-alloc circular buffer of TFDs */
 	if (txq->q.n_bd)
 		pci_free_consistent(dev, sizeof(struct iwl3945_tfd) *
-				    txq->q.n_bd, txq->tfds39, txq->q.dma_addr);
+				    txq->q.n_bd, txq->tfds, txq->q.dma_addr);
 
 	/* De-alloc array of per-TFD driver data */
 	kfree(txq->txb);