rt2x00: skb->data pointer should not include TX descriptor

Make sure the skb->data pointer points to the frame data, not the TX
descriptor. The frame dumping code relies on that.

Signed-off-by: Mattias Nissler <mattias.nissler@gmx.de>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2500usb.c

@@ -1114,8 +1114,7 @@ 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 - skbdesc->desc_len);
+	rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, skb->len);
 	rt2x00_set_field32(&word, TXD_W0_CIPHER, CIPHER_NONE);
 	rt2x00_desc_write(txd, 0, word);
 }

drivers/net/wireless/rt2x00/rt2x00usb.c

@@ -167,11 +167,6 @@ static void rt2x00usb_interrupt_txdone(struct urb *urb)
 	    !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
 		return;
 
-	/*
-	 * Remove the descriptor data from the buffer.
-	 */
-	skb_pull(entry->skb, entry->queue->desc_size);
-
 	/*
 	 * Obtain the status about this packet.
 	 * Note that when the status is 0 it does not mean the
@@ -224,6 +219,12 @@ int rt2x00usb_write_tx_data(struct queue_entry *entry)
 			  entry->skb->data, length,
 			  rt2x00usb_interrupt_txdone, entry);
 
+	/*
+	 * Make sure the skb->data pointer points to the frame, not the
+	 * descriptor.
+	 */
+	skb_pull(entry->skb, entry->queue->desc_size);
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(rt2x00usb_write_tx_data);

drivers/net/wireless/rt2x00/rt73usb.c

@@ -1556,8 +1556,7 @@ 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 - skbdesc->desc_len);
+	rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, skb->len);
 	rt2x00_set_field32(&word, TXD_W0_BURST2,
 			   test_bit(ENTRY_TXD_BURST, &txdesc->flags));
 	rt2x00_set_field32(&word, TXD_W0_CIPHER_ALG, txdesc->cipher);