tg3: Work around HW/FW limitations with vlan encapsulated frames
authorVlad Yasevich <vyasevich@gmail.com>
Thu, 18 Sep 2014 14:31:17 +0000 (10:31 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 15 Oct 2014 06:31:57 +0000 (08:31 +0200)
commit654850db1159769fc8a1c3c26ee07cd25abbddb0
treedb68f8f20530e25accab390b3877188bb517063b
parent696c5d5f340f57bf1085bc7cc95937d2349988cb
tg3: Work around HW/FW limitations with vlan encapsulated frames

[ Upstream commit 476c18850c6cbaa3f2bb661ae9710645081563b9 ]

TG3 appears to have an issue performing TSO and checksum offloading
correclty when the frame has been vlan encapsulated (non-accelrated).
In these cases, tcp checksum is not correctly updated.

This patch attempts to work around this issue.  After the patch,
802.1ad vlans start working correctly over tg3 devices.

CC: Prashant Sreedharan <prashant@broadcom.com>
CC: Michael Chan <mchan@broadcom.com>
Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/net/ethernet/broadcom/tg3.c