tree 9de12ed2f5e134a02805d09f26c11b9295bd4438
parent b67a03357cab0ccb91d641fead6f167c697a24cb
author Anjali Singhai <anjali.singhai@intel.com> 1424500955 +0000
committer Jeff Kirsher <jeffrey.t.kirsher@intel.com> 1424955238 -0800

i40e: Fix TSO with more than 8 frags per segment issue

The hardware has some limitations the driver needs to adhere to,
that we found in extended testing.
  1) no more than 8 descriptors per packet on the wire
  2) no header can span more than 3 descriptors

If one of these events occurs, the hardware will generate an internal
error and freeze the Tx queue.

This patch linearizes the skb to avoid these situations.

Change-ID: I37dab7d3966e14895a9663ec4d0aaa8eb0d9e115
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>