rt2x00: Register frame length in TX entry descriptor instead of L2PAD.

And use it consistently in the chipset drivers.
Preparation for further clean ups.

Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2400pci.c

@@ -1017,8 +1017,8 @@ static void rt2400pci_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 	rt2x00_desc_write(entry_priv->desc, 1, word);
 
 	rt2x00_desc_read(txd, 2, &word);
-	rt2x00_set_field32(&word, TXD_W2_BUFFER_LENGTH, skb->len);
-	rt2x00_set_field32(&word, TXD_W2_DATABYTE_COUNT, skb->len);
+	rt2x00_set_field32(&word, TXD_W2_BUFFER_LENGTH, txdesc->length);
+	rt2x00_set_field32(&word, TXD_W2_DATABYTE_COUNT, txdesc->length);
 	rt2x00_desc_write(txd, 2, word);
 
 	rt2x00_desc_read(txd, 3, &word);

drivers/net/wireless/rt2x00/rt2500pci.c

@@ -1208,7 +1208,7 @@ static void rt2500pci_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 	rt2x00_set_field32(&word, TXD_W0_IFS, txdesc->ifs);
 	rt2x00_set_field32(&word, TXD_W0_RETRY_MODE,
 			   test_bit(ENTRY_TXD_RETRY_MODE, &txdesc->flags));
-	rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, skb->len);
+	rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, txdesc->length);
 	rt2x00_set_field32(&word, TXD_W0_CIPHER_ALG, CIPHER_NONE);
 	rt2x00_desc_write(txd, 0, word);
 }

drivers/net/wireless/rt2x00/rt2500usb.c

@@ -1071,7 +1071,7 @@ static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 	rt2x00_set_field32(&word, TXD_W0_NEW_SEQ,
 			   test_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags));
 	rt2x00_set_field32(&word, TXD_W0_IFS, txdesc->ifs);
-	rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, skb->len);
+	rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, txdesc->length);
 	rt2x00_set_field32(&word, TXD_W0_CIPHER, !!txdesc->cipher);
 	rt2x00_set_field32(&word, TXD_W0_KEY_ID, txdesc->key_idx);
 	rt2x00_desc_write(txd, 0, word);

drivers/net/wireless/rt2x00/rt2800pci.c

@@ -663,7 +663,7 @@ static int rt2800pci_write_tx_data(struct queue_entry* entry,
 			   test_bit(ENTRY_TXD_ENCRYPT, &txdesc->flags) ?
 			   txdesc->key_idx : 0xff);
 	rt2x00_set_field32(&word, TXWI_W1_MPDU_TOTAL_BYTE_COUNT,
-			   skb->len - txdesc->l2pad);
+			   txdesc->length);
 	rt2x00_set_field32(&word, TXWI_W1_PACKETID,
 			   skbdesc->entry->queue->qid + 1);
 	rt2x00_desc_write(txwi, 1, word);

drivers/net/wireless/rt2x00/rt2800usb.c

@@ -437,7 +437,7 @@ static void rt2800usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 			   test_bit(ENTRY_TXD_ENCRYPT, &txdesc->flags) ?
 			   txdesc->key_idx : 0xff);
 	rt2x00_set_field32(&word, TXWI_W1_MPDU_TOTAL_BYTE_COUNT,
-			   skb->len - txdesc->l2pad);
+			   txdesc->length);
 	rt2x00_set_field32(&word, TXWI_W1_PACKETID,
 			   skbdesc->entry->queue->qid + 1);
 	rt2x00_desc_write(txwi, 1, word);

drivers/net/wireless/rt2x00/rt2x00queue.c

@@ -333,12 +333,10 @@ static void rt2x00queue_create_tx_descriptor(struct queue_entry *entry,
 	txdesc->aifs = entry->queue->aifs;
 
 	/*
-	 * Header and alignment information.
+	 * Header and frame information.
 	 */
+	txdesc->length = entry->skb->len;
 	txdesc->header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
-	if (test_bit(DRIVER_REQUIRE_L2PAD, &rt2x00dev->flags) &&
-	    (entry->skb->len > txdesc->header_length))
-		txdesc->l2pad = L2PAD_SIZE(txdesc->header_length);
 
 	/*
 	 * Check whether this frame is to be acked.

drivers/net/wireless/rt2x00/rt2x00queue.h

@@ -285,8 +285,8 @@ enum txentry_desc_flags {
  *
  * @flags: Descriptor flags (See &enum queue_entry_flags).
  * @queue: Queue identification (See &enum data_queue_qid).
+ * @length: Length of the entire frame.
  * @header_length: Length of 802.11 header.
- * @l2pad: Amount of padding to align 802.11 payload to 4-byte boundrary.
  * @length_high: PLCP length high word.
  * @length_low: PLCP length low word.
  * @signal: PLCP signal.
@@ -311,8 +311,8 @@ struct txentry_desc {
 
 	enum data_queue_qid queue;
 
+	u16 length;
 	u16 header_length;
-	u16 l2pad;
 
 	u16 length_high;
 	u16 length_low;

drivers/net/wireless/rt2x00/rt61pci.c

@@ -1808,7 +1808,8 @@ static void rt61pci_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 
 	if (skbdesc->desc_len > TXINFO_SIZE) {
 		rt2x00_desc_read(txd, 11, &word);
-		rt2x00_set_field32(&word, TXD_W11_BUFFER_LENGTH0, skb->len);
+		rt2x00_set_field32(&word, TXD_W11_BUFFER_LENGTH0,
+				   txdesc->length);
 		rt2x00_desc_write(txd, 11, word);
 	}
 
@@ -1831,7 +1832,7 @@ static void rt61pci_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 	rt2x00_set_field32(&word, TXD_W0_KEY_TABLE,
 			   test_bit(ENTRY_TXD_ENCRYPT_PAIRWISE, &txdesc->flags));
 	rt2x00_set_field32(&word, TXD_W0_KEY_INDEX, txdesc->key_idx);
-	rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, skb->len);
+	rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, txdesc->length);
 	rt2x00_set_field32(&word, TXD_W0_BURST,
 			   test_bit(ENTRY_TXD_BURST, &txdesc->flags));
 	rt2x00_set_field32(&word, TXD_W0_CIPHER_ALG, txdesc->cipher);

drivers/net/wireless/rt2x00/rt73usb.c

@@ -1494,7 +1494,7 @@ static void rt73usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 	rt2x00_set_field32(&word, TXD_W0_KEY_TABLE,
 			   test_bit(ENTRY_TXD_ENCRYPT_PAIRWISE, &txdesc->flags));
 	rt2x00_set_field32(&word, TXD_W0_KEY_INDEX, txdesc->key_idx);
-	rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, skb->len);
+	rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, txdesc->length);
 	rt2x00_set_field32(&word, TXD_W0_BURST2,
 			   test_bit(ENTRY_TXD_BURST, &txdesc->flags));
 	rt2x00_set_field32(&word, TXD_W0_CIPHER_ALG, txdesc->cipher);