Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fc4b6853fb5e729616159d4f17785f089227a8e8
Commit:     fc4b6853fb5e729616159d4f17785f089227a8e8
Parent:     91e1747384b80813c2a6c7a9d2dd99722d5b9e1e
Author:     Tomas Winkler <[EMAIL PROTECTED]>
AuthorDate: Thu Oct 25 17:15:24 2007 +0800
Committer:  David S. Miller <[EMAIL PROTECTED]>
CommitDate: Mon Jan 28 15:03:08 2008 -0800

    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 <[EMAIL PROTECTED]>
    Signed-off-by: John W. Linville <[EMAIL PROTECTED]>
---
 drivers/net/wireless/iwlwifi/iwl-3945.c     |   12 +++---
 drivers/net/wireless/iwlwifi/iwl-4965.c     |   26 +++++-----
 drivers/net/wireless/iwlwifi/iwl3945-base.c |   60 ++++++++++++------------
 drivers/net/wireless/iwlwifi/iwl4965-base.c |   64 +++++++++++++-------------
 drivers/net/wireless/iwlwifi/iwlwifi.h      |    4 +-
 5 files changed, 83 insertions(+), 83 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c 
b/drivers/net/wireless/iwlwifi/iwl-3945.c
index d611281..b8d4343 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;
                        }
                }
        }
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c 
b/drivers/net/wireless/iwlwifi/iwl-4965.c
index 7ff8f72..d7e181f 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.c
@@ -1749,14 +1749,14 @@ void iwl_hw_txq_ctx_free(struct iwl_priv *priv)
 }
 
 /**
- * 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 = 0;
@@ -1796,11 +1796,11 @@ int iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct 
iwl_tx_queue *txq)
                                         IWL_GET_BITS(bd->pa[index], tb1_len),
                                         PCI_DMA_TODEVICE);
 
-               if (txq->txb[txq->q.last_used].skb[i]) {
-                       struct sk_buff *skb = txq->txb[txq->q.last_used].skb[i];
+               if (txq->txb[txq->q.read_ptr].skb[i]) {
+                       struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[i];
 
                        dev_kfree_skb(skb);
-                       txq->txb[txq->q.last_used].skb[i] = NULL;
+                       txq->txb[txq->q.read_ptr].skb[i] = NULL;
                }
        }
        return 0;
@@ -2776,11 +2776,11 @@ int iwl4965_tx_queue_update_wr_ptr(struct iwl_priv 
*priv,
        len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
 
        IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
-                      tfd_offset[txq->q.first_empty], byte_cnt, len);
+                      tfd_offset[txq->q.write_ptr], byte_cnt, len);
 
-       if (txq->q.first_empty < IWL4965_MAX_WIN_SIZE)
+       if (txq->q.write_ptr < IWL4965_MAX_WIN_SIZE)
                IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
-                       tfd_offset[IWL4965_QUEUE_SIZE + txq->q.first_empty],
+                       tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
                        byte_cnt, len);
 
        return 0;
@@ -4134,7 +4134,7 @@ static void iwl4965_rx_reply_compressed_ba(struct 
iwl_priv *priv,
 */
        iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
        /* releases all the TFDs until the SSN */
-       if (txq->q.last_used != (ba_resp_scd_ssn & 0xff))
+       if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff))
                iwl_tx_queue_reclaim(priv, ba_resp_scd_flow, index);
 
 }
@@ -4205,8 +4205,8 @@ static int iwl4965_tx_queue_agg_enable(struct iwl_priv 
*priv, int txq_id,
 
        iwl_set_bits_restricted_reg(priv, SCD_QUEUECHAIN_SEL, (1<<txq_id));
 
-       priv->txq[txq_id].q.last_used = (ssn_idx & 0xff);
-       priv->txq[txq_id].q.first_empty = (ssn_idx & 0xff);
+       priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
+       priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
 
        /* supposes that ssn_idx is valid (!= 0xFFF) */
        iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
@@ -4257,8 +4257,8 @@ static int iwl4965_tx_queue_agg_disable(struct iwl_priv 
*priv, u16 txq_id,
 
        iwl_clear_bits_restricted_reg(priv, SCD_QUEUECHAIN_SEL, (1 << txq_id));
 
-       priv->txq[txq_id].q.last_used = (ssn_idx & 0xff);
-       priv->txq[txq_id].q.first_empty = (ssn_idx & 0xff);
+       priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
+       priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
        /* supposes that ssn_idx is valid (!= 0xFFF) */
        iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
 
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c 
b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index 4fd9eac..f602264 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -209,9 +209,9 @@ static void iwl_print_hex_dump(int level, void *p, u32 len)
 
 static int iwl_queue_space(const struct iwl_queue *q)
 {
-       int s = q->last_used - q->first_empty;
+       int s = q->read_ptr - q->write_ptr;
 
-       if (q->last_used > q->first_empty)
+       if (q->read_ptr > q->write_ptr)
                s -= q->n_bd;
 
        if (s <= 0)
@@ -237,9 +237,9 @@ static inline int iwl_queue_dec_wrap(int index, int n_bd)
 
 static inline int x2_queue_used(const struct iwl_queue *q, int i)
 {
-       return q->first_empty > q->last_used ?
-               (i >= q->last_used && i < q->first_empty) :
-               !(i < q->last_used && i >= q->first_empty);
+       return q->write_ptr > q->read_ptr ?
+               (i >= q->read_ptr && i < q->write_ptr) :
+               !(i < q->read_ptr && i >= q->write_ptr);
 }
 
 static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
@@ -273,7 +273,7 @@ static int iwl_queue_init(struct iwl_priv *priv, struct 
iwl_queue *q,
        if (q->high_mark < 2)
                q->high_mark = 2;
 
-       q->first_empty = q->last_used = 0;
+       q->write_ptr = q->read_ptr = 0;
 
        return 0;
 }
@@ -369,8 +369,8 @@ void iwl_tx_queue_free(struct iwl_priv *priv, struct 
iwl_tx_queue *txq)
                return;
 
        /* first, empty all BD's */
-       for (; q->first_empty != q->last_used;
-            q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd))
+       for (; q->write_ptr != q->read_ptr;
+            q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
                iwl_hw_txq_free_tfd(priv, txq);
 
        len = sizeof(struct iwl_cmd) * q->n_window;
@@ -649,12 +649,12 @@ static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct 
iwl_host_cmd *cmd)
 
        spin_lock_irqsave(&priv->hcmd_lock, flags);
 
-       tfd = &txq->bd[q->first_empty];
+       tfd = &txq->bd[q->write_ptr];
        memset(tfd, 0, sizeof(*tfd));
 
        control_flags = (u32 *) tfd;
 
-       idx = get_cmd_index(q, q->first_empty, cmd->meta.flags & CMD_SIZE_HUGE);
+       idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
        out_cmd = &txq->cmd[idx];
 
        out_cmd->hdr.cmd = cmd->id;
@@ -666,7 +666,7 @@ static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct 
iwl_host_cmd *cmd)
 
        out_cmd->hdr.flags = 0;
        out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
-                       INDEX_TO_SEQ(q->first_empty));
+                       INDEX_TO_SEQ(q->write_ptr));
        if (out_cmd->meta.flags & CMD_SIZE_HUGE)
                out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 
@@ -682,10 +682,10 @@ static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct 
iwl_host_cmd *cmd)
                     "%d bytes at %d[%d]:%d\n",
                     get_cmd_string(out_cmd->hdr.cmd),
                     out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
-                    fix_size, q->first_empty, idx, IWL_CMD_QUEUE_NUM);
+                    fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 
        txq->need_update = 1;
-       q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
+       q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
        ret = iwl_tx_queue_update_write_ptr(priv, txq);
 
        spin_unlock_irqrestore(&priv->hcmd_lock, flags);
@@ -2799,21 +2799,21 @@ static int iwl_tx_skb(struct iwl_priv *priv,
 
        spin_lock_irqsave(&priv->lock, flags);
 
-       tfd = &txq->bd[q->first_empty];
+       tfd = &txq->bd[q->write_ptr];
        memset(tfd, 0, sizeof(*tfd));
        control_flags = (u32 *) tfd;
-       idx = get_cmd_index(q, q->first_empty, 0);
+       idx = get_cmd_index(q, q->write_ptr, 0);
 
-       memset(&(txq->txb[q->first_empty]), 0, sizeof(struct iwl_tx_info));
-       txq->txb[q->first_empty].skb[0] = skb;
-       memcpy(&(txq->txb[q->first_empty].status.control),
+       memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
+       txq->txb[q->write_ptr].skb[0] = skb;
+       memcpy(&(txq->txb[q->write_ptr].status.control),
               ctl, sizeof(struct ieee80211_tx_control));
        out_cmd = &txq->cmd[idx];
        memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
        memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
        out_cmd->hdr.cmd = REPLY_TX;
        out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
-                               INDEX_TO_SEQ(q->first_empty)));
+                               INDEX_TO_SEQ(q->write_ptr)));
        /* copy frags header */
        memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
 
@@ -2881,7 +2881,7 @@ static int iwl_tx_skb(struct iwl_priv *priv,
        iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
                           ieee80211_get_hdrlen(fc));
 
-       q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
+       q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
        rc = iwl_tx_queue_update_write_ptr(priv, txq);
        spin_unlock_irqrestore(&priv->lock, flags);
 
@@ -3375,20 +3375,20 @@ int iwl_tx_queue_reclaim(struct iwl_priv *priv, int 
txq_id, int index)
        if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
                IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
                          "is out of range [0-%d] %d %d.\n", txq_id,
-                         index, q->n_bd, q->first_empty, q->last_used);
+                         index, q->n_bd, q->write_ptr, q->read_ptr);
                return 0;
        }
 
        for (index = iwl_queue_inc_wrap(index, q->n_bd);
-               q->last_used != index;
-               q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) {
+               q->read_ptr != index;
+               q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
                if (txq_id != IWL_CMD_QUEUE_NUM) {
                        iwl_txstatus_to_ieee(priv,
-                                       &(txq->txb[txq->q.last_used]));
+                                       &(txq->txb[txq->q.read_ptr]));
                        iwl_hw_txq_free_tfd(priv, txq);
                } else if (nfreed > 1) {
                        IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
-                                       q->first_empty, q->last_used);
+                                       q->write_ptr, q->read_ptr);
                        queue_work(priv->workqueue, &priv->restart);
                }
                nfreed++;
@@ -3428,12 +3428,12 @@ static void iwl_rx_reply_tx(struct iwl_priv *priv,
        if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
                IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
                          "is out of range [0-%d] %d %d\n", txq_id,
-                         index, txq->q.n_bd, txq->q.first_empty,
-                         txq->q.last_used);
+                         index, txq->q.n_bd, txq->q.write_ptr,
+                         txq->q.read_ptr);
                return;
        }
 
-       tx_status = &(txq->txb[txq->q.last_used].status);
+       tx_status = &(txq->txb[txq->q.read_ptr].status);
 
        tx_status->retry_count = tx_resp->failure_frame;
        tx_status->queue_number = status;
@@ -4368,14 +4368,14 @@ int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
                if (rc)
                        return rc;
                iwl_write_restricted(priv, HBUS_TARG_WRPTR,
-                                    txq->q.first_empty | (txq_id << 8));
+                                    txq->q.write_ptr | (txq_id << 8));
                iwl_release_restricted_access(priv);
 
        /* else not in power-save mode, uCode will never sleep when we're
         * trying to tx (during RFKILL, we're not trying to tx). */
        } else
                iwl_write32(priv, HBUS_TARG_WRPTR,
-                           txq->q.first_empty | (txq_id << 8));
+                           txq->q.write_ptr | (txq_id << 8));
 
        txq->need_update = 0;
 
diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c 
b/drivers/net/wireless/iwlwifi/iwl4965-base.c
index eb2d7a5..e0feca8 100644
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -208,9 +208,9 @@ static void iwl_print_hex_dump(int level, void *p, u32 len)
 
 static int iwl_queue_space(const struct iwl_queue *q)
 {
-       int s = q->last_used - q->first_empty;
+       int s = q->read_ptr - q->write_ptr;
 
-       if (q->last_used > q->first_empty)
+       if (q->read_ptr > q->write_ptr)
                s -= q->n_bd;
 
        if (s <= 0)
@@ -236,9 +236,9 @@ static inline int iwl_queue_dec_wrap(int index, int n_bd)
 
 static inline int x2_queue_used(const struct iwl_queue *q, int i)
 {
-       return q->first_empty > q->last_used ?
-               (i >= q->last_used && i < q->first_empty) :
-               !(i < q->last_used && i >= q->first_empty);
+       return q->write_ptr > q->read_ptr ?
+               (i >= q->read_ptr && i < q->write_ptr) :
+               !(i < q->read_ptr && i >= q->write_ptr);
 }
 
 static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
@@ -272,7 +272,7 @@ static int iwl_queue_init(struct iwl_priv *priv, struct 
iwl_queue *q,
        if (q->high_mark < 2)
                q->high_mark = 2;
 
-       q->first_empty = q->last_used = 0;
+       q->write_ptr = q->read_ptr = 0;
 
        return 0;
 }
@@ -368,8 +368,8 @@ void iwl_tx_queue_free(struct iwl_priv *priv, struct 
iwl_tx_queue *txq)
                return;
 
        /* first, empty all BD's */
-       for (; q->first_empty != q->last_used;
-            q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd))
+       for (; q->write_ptr != q->read_ptr;
+            q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
                iwl_hw_txq_free_tfd(priv, txq);
 
        len = sizeof(struct iwl_cmd) * q->n_window;
@@ -652,12 +652,12 @@ static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct 
iwl_host_cmd *cmd)
 
        spin_lock_irqsave(&priv->hcmd_lock, flags);
 
-       tfd = &txq->bd[q->first_empty];
+       tfd = &txq->bd[q->write_ptr];
        memset(tfd, 0, sizeof(*tfd));
 
        control_flags = (u32 *) tfd;
 
-       idx = get_cmd_index(q, q->first_empty, cmd->meta.flags & CMD_SIZE_HUGE);
+       idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
        out_cmd = &txq->cmd[idx];
 
        out_cmd->hdr.cmd = cmd->id;
@@ -669,7 +669,7 @@ static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct 
iwl_host_cmd *cmd)
 
        out_cmd->hdr.flags = 0;
        out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
-                       INDEX_TO_SEQ(q->first_empty));
+                       INDEX_TO_SEQ(q->write_ptr));
        if (out_cmd->meta.flags & CMD_SIZE_HUGE)
                out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 
@@ -681,11 +681,11 @@ static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct 
iwl_host_cmd *cmd)
                     "%d bytes at %d[%d]:%d\n",
                     get_cmd_string(out_cmd->hdr.cmd),
                     out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
-                    fix_size, q->first_empty, idx, IWL_CMD_QUEUE_NUM);
+                    fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 
        txq->need_update = 1;
        ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
-       q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
+       q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
        iwl_tx_queue_update_write_ptr(priv, txq);
 
        spin_unlock_irqrestore(&priv->hcmd_lock, flags);
@@ -2889,21 +2889,21 @@ static int iwl_tx_skb(struct iwl_priv *priv,
 
        spin_lock_irqsave(&priv->lock, flags);
 
-       tfd = &txq->bd[q->first_empty];
+       tfd = &txq->bd[q->write_ptr];
        memset(tfd, 0, sizeof(*tfd));
        control_flags = (u32 *) tfd;
-       idx = get_cmd_index(q, q->first_empty, 0);
+       idx = get_cmd_index(q, q->write_ptr, 0);
 
-       memset(&(txq->txb[q->first_empty]), 0, sizeof(struct iwl_tx_info));
-       txq->txb[q->first_empty].skb[0] = skb;
-       memcpy(&(txq->txb[q->first_empty].status.control),
+       memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
+       txq->txb[q->write_ptr].skb[0] = skb;
+       memcpy(&(txq->txb[q->write_ptr].status.control),
               ctl, sizeof(struct ieee80211_tx_control));
        out_cmd = &txq->cmd[idx];
        memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
        memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
        out_cmd->hdr.cmd = REPLY_TX;
        out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
-                               INDEX_TO_SEQ(q->first_empty)));
+                               INDEX_TO_SEQ(q->write_ptr)));
        /* copy frags header */
        memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
 
@@ -2969,7 +2969,7 @@ static int iwl_tx_skb(struct iwl_priv *priv,
 
        iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
 
-       q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
+       q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
        rc = iwl_tx_queue_update_write_ptr(priv, txq);
        spin_unlock_irqrestore(&priv->lock, flags);
 
@@ -3463,20 +3463,20 @@ int iwl_tx_queue_reclaim(struct iwl_priv *priv, int 
txq_id, int index)
        if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
                IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
                          "is out of range [0-%d] %d %d.\n", txq_id,
-                         index, q->n_bd, q->first_empty, q->last_used);
+                         index, q->n_bd, q->write_ptr, q->read_ptr);
                return 0;
        }
 
        for (index = iwl_queue_inc_wrap(index, q->n_bd);
-               q->last_used != index;
-               q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) {
+               q->read_ptr != index;
+               q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
                if (txq_id != IWL_CMD_QUEUE_NUM) {
                        iwl_txstatus_to_ieee(priv,
-                                       &(txq->txb[txq->q.last_used]));
+                                       &(txq->txb[txq->q.read_ptr]));
                        iwl_hw_txq_free_tfd(priv, txq);
                } else if (nfreed > 1) {
                        IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
-                                       q->first_empty, q->last_used);
+                                       q->write_ptr, q->read_ptr);
                        queue_work(priv->workqueue, &priv->restart);
                }
                nfreed++;
@@ -3564,7 +3564,7 @@ static int iwl4965_tx_status_reply_tx(struct iwl_priv 
*priv,
                IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d \n",
                                   agg->frame_count, agg->start_idx);
 
-               tx_status = &(priv->txq[txq_id].txb[txq->q.last_used].status);
+               tx_status = &(priv->txq[txq_id].txb[txq->q.read_ptr].status);
                tx_status->retry_count = tx_resp->failure_frame;
                tx_status->queue_number = status & 0xff;
                tx_status->queue_length = tx_resp->bt_kill_count;
@@ -3669,8 +3669,8 @@ static void iwl_rx_reply_tx(struct iwl_priv *priv,
        if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
                IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
                          "is out of range [0-%d] %d %d\n", txq_id,
-                         index, txq->q.n_bd, txq->q.first_empty,
-                         txq->q.last_used);
+                         index, txq->q.n_bd, txq->q.write_ptr,
+                         txq->q.read_ptr);
                return;
        }
 
@@ -3705,7 +3705,7 @@ static void iwl_rx_reply_tx(struct iwl_priv *priv,
                        /* TODO: send BAR */
                }
 
-               if ((txq->q.last_used != (scd_ssn & 0xff))) {
+               if ((txq->q.read_ptr != (scd_ssn & 0xff))) {
                        index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
                        IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
                                           "%d index %d\n", scd_ssn , index);
@@ -3714,7 +3714,7 @@ static void iwl_rx_reply_tx(struct iwl_priv *priv,
        } else {
 #endif /* CONFIG_IWLWIFI_HT_AGG */
 #endif /* CONFIG_IWLWIFI_HT */
-       tx_status = &(txq->txb[txq->q.last_used].status);
+       tx_status = &(txq->txb[txq->q.read_ptr].status);
 
        tx_status->retry_count = tx_resp->failure_frame;
        tx_status->queue_number = status;
@@ -4692,14 +4692,14 @@ int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
                if (rc)
                        return rc;
                iwl_write_restricted(priv, HBUS_TARG_WRPTR,
-                                    txq->q.first_empty | (txq_id << 8));
+                                    txq->q.write_ptr | (txq_id << 8));
                iwl_release_restricted_access(priv);
 
        /* else not in power-save mode, uCode will never sleep when we're
         * trying to tx (during RFKILL, we're not trying to tx). */
        } else
                iwl_write32(priv, HBUS_TARG_WRPTR,
-                           txq->q.first_empty | (txq_id << 8));
+                           txq->q.write_ptr | (txq_id << 8));
 
        txq->need_update = 0;
 
diff --git a/drivers/net/wireless/iwlwifi/iwlwifi.h 
b/drivers/net/wireless/iwlwifi/iwlwifi.h
index 8e52fef..bcff696 100644
--- a/drivers/net/wireless/iwlwifi/iwlwifi.h
+++ b/drivers/net/wireless/iwlwifi/iwlwifi.h
@@ -144,8 +144,8 @@ struct iwl_rt_tx_hdr {
  */
 struct iwl_queue {
        int n_bd;              /* number of BDs in this queue */
-       int first_empty;       /* 1-st empty entry (index) host_w*/
-       int last_used;         /* last used entry (index) host_r*/
+       int write_ptr;       /* 1-st empty entry (index) host_w*/
+       int read_ptr;         /* last used entry (index) host_r*/
        dma_addr_t dma_addr;   /* physical addr for BD's */
        int n_window;          /* safe queue window */
        u32 id;
-
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