dm9601: HW header size shouldn't be included in packet length

The dm9601 driver was including the 2 byte hardware header in the
packet length, causing the HW to send 2 extra bytes of garbage on tx.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/net/usb/dm9601.c b/drivers/net/usb/dm9601.c
index a67638601477..ac200b0f6a92 100644
--- a/drivers/net/usb/dm9601.c
+++ b/drivers/net/usb/dm9601.c
@@ -489,6 +489,8 @@ static struct sk_buff *dm9601_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
            b3..n: packet data
         */
 
+        len = skb->len;
+
         if (skb_headroom(skb) < DM_TX_OVERHEAD) {
                 struct sk_buff *skb2;
 
@@ -501,10 +503,9 @@ static struct sk_buff *dm9601_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
 
         __skb_push(skb, DM_TX_OVERHEAD);
 
-        len = skb->len;
         /* usbnet adds padding if length is a multiple of packet size
            if so, adjust length value in header */
-        if ((len % dev->maxpacket) == 0)
+        if ((skb->len % dev->maxpacket) == 0)
                 len++;
 
         skb->data[0] = len;