[Intel-wired-lan] [next-queue v2] i40e: Add a check to see if MFS is set

[Bowers, AndrewX]

-----Original Message-----
From: Intel-wired-lan <intel-wired-lan-bounces at osuosl.org> On Behalf Of Jeff Kirsher
Sent: Tuesday, April 7, 2020 3:12 PM
To: intel-wired-lan at lists.osuosl.org
Subject: [Intel-wired-lan] [next-queue v2] i40e: Add a check to see if MFS is set

From: Todd Fujinaka <todd.fujinaka at intel.com>

A customer was chain-booting to provision his systems and one of the steps was setting MFS. MFS isn't cleared by normal warm reboots (clearing requires a GLOBR) and there was no indication of why Jumbo Frame receives were failing.

Add a warning if MFS is set to anything lower than the default.

Signed-off-by: Todd Fujinaka <todd.fujinaka at intel.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg at intel.com>
---
v2: added missing defines

 drivers/net/ethernet/intel/i40e/i40e_main.c     | 9 +++++++++
 drivers/net/ethernet/intel/i40e/i40e_register.h | 8 ++++++++
 2 files changed, 17 insertions(+)


Tested-by: Andrew Bowers <andrewx.bowers at intel.com>