* TX descriptor initialization
  */
 static void rt2400pci_write_tx_desc(struct rt2x00_dev *rt2x00dev,
-                                   __le32 *txd,
+                                   struct sk_buff *skb,
                                    struct txdata_entry_desc *desc,
-                                   struct ieee80211_hdr *ieee80211hdr,
-                                   unsigned int length,
                                    struct ieee80211_tx_control *control)
 {
+       struct skb_desc *skbdesc = get_skb_desc(skb);
+       __le32 *txd = skbdesc->desc;
        u32 word;
 
        /*
         * Start writing the descriptor words.
         */
        rt2x00_desc_read(txd, 2, &word);
-       rt2x00_set_field32(&word, TXD_W2_DATABYTE_COUNT, length);
+       rt2x00_set_field32(&word, TXD_W2_DATABYTE_COUNT, skbdesc->data_len);
        rt2x00_desc_write(txd, 2, word);
 
        rt2x00_desc_read(txd, 3, &word);
 
  * TX descriptor initialization
  */
 static void rt2500pci_write_tx_desc(struct rt2x00_dev *rt2x00dev,
-                                   __le32 *txd,
+                                   struct sk_buff *skb,
                                    struct txdata_entry_desc *desc,
-                                   struct ieee80211_hdr *ieee80211hdr,
-                                   unsigned int length,
                                    struct ieee80211_tx_control *control)
 {
+       struct skb_desc *skbdesc = get_skb_desc(skb);
+       __le32 *txd = skbdesc->desc;
        u32 word;
 
        /*
        rt2x00_set_field32(&word, TXD_W0_RETRY_MODE,
                           !!(control->flags &
                              IEEE80211_TXCTL_LONG_RETRY_LIMIT));
-       rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, length);
+       rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, skbdesc->data_len);
        rt2x00_set_field32(&word, TXD_W0_CIPHER_ALG, CIPHER_NONE);
        rt2x00_desc_write(txd, 0, word);
 }
 
  * TX descriptor initialization
  */
 static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
-                                   __le32 *txd,
+                                   struct sk_buff *skb,
                                    struct txdata_entry_desc *desc,
-                                   struct ieee80211_hdr *ieee80211hdr,
-                                   unsigned int length,
                                    struct ieee80211_tx_control *control)
 {
+       struct skb_desc *skbdesc = get_skb_desc(skb);
+       __le32 *txd = skbdesc->desc;
        u32 word;
 
        /*
        rt2x00_set_field32(&word, TXD_W0_NEW_SEQ,
                           !!(control->flags & IEEE80211_TXCTL_FIRST_FRAGMENT));
        rt2x00_set_field32(&word, TXD_W0_IFS, desc->ifs);
-       rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, length);
+       rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, skbdesc->data_len);
        rt2x00_set_field32(&word, TXD_W0_CIPHER, CIPHER_NONE);
        rt2x00_desc_write(txd, 0, word);
 }
 
         * TX control handlers
         */
        void (*write_tx_desc) (struct rt2x00_dev *rt2x00dev,
-                              __le32 *txd,
+                              struct sk_buff *skb,
                               struct txdata_entry_desc *desc,
-                              struct ieee80211_hdr *ieee80211hdr,
-                              unsigned int length,
                               struct ieee80211_tx_control *control);
        int (*write_tx_data) (struct rt2x00_dev *rt2x00dev,
                              struct data_ring *ring, struct sk_buff *skb,
 
        struct txdata_entry_desc desc;
        struct skb_desc *skbdesc = get_skb_desc(skb);
        struct ieee80211_hdr *ieee80211hdr = skbdesc->data;
-       __le32 *txd = skbdesc->desc;
        int tx_rate;
        int bitrate;
        int length;
                        desc.signal |= 0x08;
        }
 
-       rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, txd, &desc, ieee80211hdr,
-                                          skbdesc->data_len, control);
+       rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, skb, &desc, control);
 
        /*
         * Update ring entry.
 
  * TX descriptor initialization
  */
 static void rt61pci_write_tx_desc(struct rt2x00_dev *rt2x00dev,
-                                 __le32 *txd,
-                                 struct txdata_entry_desc *desc,
-                                 struct ieee80211_hdr *ieee80211hdr,
-                                 unsigned int length,
-                                 struct ieee80211_tx_control *control)
+                                   struct sk_buff *skb,
+                                   struct txdata_entry_desc *desc,
+                                   struct ieee80211_tx_control *control)
 {
+       struct skb_desc *skbdesc = get_skb_desc(skb);
+       __le32 *txd = skbdesc->desc;
        u32 word;
 
        /*
        rt2x00_desc_write(txd, 5, word);
 
        rt2x00_desc_read(txd, 11, &word);
-       rt2x00_set_field32(&word, TXD_W11_BUFFER_LENGTH0, length);
+       rt2x00_set_field32(&word, TXD_W11_BUFFER_LENGTH0, skbdesc->data_len);
        rt2x00_desc_write(txd, 11, word);
 
        rt2x00_desc_read(txd, 0, &word);
                           !!(control->flags &
                              IEEE80211_TXCTL_LONG_RETRY_LIMIT));
        rt2x00_set_field32(&word, TXD_W0_TKIP_MIC, 0);
-       rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, length);
+       rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, skbdesc->data_len);
        rt2x00_set_field32(&word, TXD_W0_BURST,
                           test_bit(ENTRY_TXD_BURST, &desc->flags));
        rt2x00_set_field32(&word, TXD_W0_CIPHER_ALG, CIPHER_NONE);
 
  * TX descriptor initialization
  */
 static void rt73usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
-                                 __le32 *txd,
-                                 struct txdata_entry_desc *desc,
-                                 struct ieee80211_hdr *ieee80211hdr,
-                                 unsigned int length,
-                                 struct ieee80211_tx_control *control)
+                                   struct sk_buff *skb,
+                                   struct txdata_entry_desc *desc,
+                                   struct ieee80211_tx_control *control)
 {
+       struct skb_desc *skbdesc = get_skb_desc(skb);
+       __le32 *txd = skbdesc->desc;
        u32 word;
 
        /*
                           !!(control->flags &
                              IEEE80211_TXCTL_LONG_RETRY_LIMIT));
        rt2x00_set_field32(&word, TXD_W0_TKIP_MIC, 0);
-       rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, length);
+       rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, skbdesc->data_len);
        rt2x00_set_field32(&word, TXD_W0_BURST2,
                           test_bit(ENTRY_TXD_BURST, &desc->flags));
        rt2x00_set_field32(&word, TXD_W0_CIPHER_ALG, CIPHER_NONE);