rt2x00: Fix rt2800usb TX descriptor writing.

The recent changes to skb handling introduced a bug in the rt2800usb
TX descriptor writing whereby the length of the USB packet wasn't
calculated correctly.
Found via code inspection, as the devices themselves didn't seem to mind.

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

diff --git a/drivers/net/wireless/rt2x00/rt2800usb.c b/drivers/net/wireless/rt2x00/rt2800usb.c
index 0f8b84b..6991613 100644 (file)
--- a/drivers/net/wireless/rt2x00/rt2800usb.c
+++ b/drivers/net/wireless/rt2x00/rt2800usb.c
@@ -413,7 +413,7 @@ static void rt2800usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
         */
        rt2x00_desc_read(txi, 0, &word);
        rt2x00_set_field32(&word, TXINFO_W0_USB_DMA_TX_PKT_LEN,
-                          skb->len + TXWI_DESC_SIZE);
+                          skb->len - TXINFO_DESC_SIZE);
        rt2x00_set_field32(&word, TXINFO_W0_WIV,
                           !test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc->flags));
        rt2x00_set_field32(&word, TXINFO_W0_QSEL, 2);