[PATCH 001/001] smsc95xx: Fix hard_header_len
From: JamesBetts <hidden>
Date: 2012-08-15 19:49:51
Subsystem:
networking drivers, the rest, usb networking drivers, usb smsc95xx ethernet driver · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Steve Glendinning
This device may require up-to 12 bytes of headroom. Assign the needed_headroom but stop lying about hard_header_len which is used in other places throughout the kernel. Without this patch it is not possible to use "IFB + tc filter ... action ... dev ifb0" as per http://www.linuxfoundation.org/collaborate/workgroups/networking/ifb. Tested using Raspberry Pi as a router with trafficshaping and IFB. --- drivers/net/usb/smsc95xx.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index 0aee6c0..02293dd 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c@@ -1071,8 +1071,8 @@ 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_CSUM; - dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; + dev->net->needed_headroom = SMSC95XX_TX_OVERHEAD_CSUM; + dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len + dev->net->needed_headroom; return 0; }
--
1.7.4.1.433.gcd306