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Date:	Wed, 10 Mar 2010 18:32:34 +0000
From:	Steve Glendinning <>
Subject: [PATCH 1/6] smsc95xx: change hard_header_len to include csum offload bytes

If tx checksum offload is enabled on this device it requires 12
bytes of headroom instead of 8.  This patch sets hard_header_len
to the larger of the two to help avoid skb_copy_expand.

Signed-off-by: Steve Glendinning <>
 drivers/net/usb/smsc95xx.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index df9179a..4db0840 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -1037,7 +1037,7 @@ static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
 	dev->net->netdev_ops = &smsc95xx_netdev_ops;
 	dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
 	dev->net->flags |= IFF_MULTICAST;
-	dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD;
+	dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
 	return 0;

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