iwlwifi: renaming last_used and first_empty

This patch renames queue pointers to write_ptr and read_ptr
instead of  first_empty and last_used. This is closer to technical
terminology we everyday use

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

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
index d6112816bada..b8d43436d35a 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.c
@@ -526,14 +526,14 @@ int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr,
 }
 
 /**
- * iwl_hw_txq_free_tfd - Free one TFD, those at index [txq->q.last_used]
+ * iwl_hw_txq_free_tfd - Free one TFD, those at index [txq->q.read_ptr]
  *
  * Does NOT advance any indexes
  */
 int iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 {
         struct iwl_tfd_frame *bd_tmp = (struct iwl_tfd_frame *)&txq->bd[0];
-        struct iwl_tfd_frame *bd = &bd_tmp[txq->q.last_used];
+        struct iwl_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
         struct pci_dev *dev = priv->pci_dev;
         int i;
         int counter;
@@ -556,12 +556,12 @@ int iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
         for (i = 1; i < counter; i++) {
                 pci_unmap_single(dev, le32_to_cpu(bd->pa[i].addr),
                                  le32_to_cpu(bd->pa[i].len), PCI_DMA_TODEVICE);
-                if (txq->txb[txq->q.last_used].skb[0]) {
-                        struct sk_buff *skb = txq->txb[txq->q.last_used].skb[0];
-                        if (txq->txb[txq->q.last_used].skb[0]) {
+                if (txq->txb[txq->q.read_ptr].skb[0]) {
+                        struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[0];
+                        if (txq->txb[txq->q.read_ptr].skb[0]) {
                                 /* Can be called from interrupt context */
                                 dev_kfree_skb_any(skb);
-                                txq->txb[txq->q.last_used].skb[0] = NULL;
+                                txq->txb[txq->q.read_ptr].skb[0] = NULL;
                         }
                 }
         }