i40e: fix TCP flag replication for hardware offload
authorJesse Brandeburg <jesse.brandeburg@intel.com>
Tue, 1 Apr 2014 09:07:20 +0000 (09:07 +0000)
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>
Sat, 19 Apr 2014 00:42:45 +0000 (17:42 -0700)
commit059dab69652da3525d320d77ac5422ec708ced14
treed4efdfc6e31e663ba1197aa6c88ca7a59e422435
parentdd225bc675bc16972cc11f73fa0dc3ccb1ed9da1
i40e: fix TCP flag replication for hardware offload

As reported by Eric Dumazet, the i40e driver was allowing the hardware
to replicate the PSH flag on all segments of a TSO operation.

This patch fixes the first/middle/last TCP flags settings which
makes the TSO operations work correctly.

With this change we are now configuring the CWR bit to only be set
in the first packet of a TSO, so this patch also enables TSO_ECN,
in order to advertise to the stack that we do the right thing
on the wire.

Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
drivers/net/ethernet/intel/i40e/i40e_main.c