Comment 0 for bug 1432848

== Comment: #0 - Carol L. Soto <email address hidden> - 2015-03-16 15:54:40 ==
---Problem Description---
ethtool -t eth18
The test result is FAIL
The test extra info:
Interrupt Test 0
Link Test 0
Speed Test 0
Register Test 0
Loopback Test 1

Will see this message in dmesg:
mlx4_en: eth18: Loopback packet didn't arrive

Contact Information = Carol <email address hidden>

---uname output---
Linux powerio-le21 3.19.0-8-generic #8-Ubuntu SMP Tue Mar 10 13:07:58 UTC 2015 ppc64le ppc64le ppc64le GNU/Linux

---Additional Hardware Info---
Need a Mellanox RoCE adapter like CX3 40G or CX3 Pro 10G

Machine Type = P8

---Debugger---
A debugger is not configured

---Steps to Reproduce---
 ethtool -t ethX

Stack trace output:
 no

Oops output:
 no

System Dump Info:
  The system is not configured to capture a system dump.

*Additional Instructions for Carol <email address hidden>:
-Attach sysctl -a output output to the bug.

== Comment: #1 - Carol L. Soto <email address hidden> - 2015-03-16 15:55:36 ==
Patch to fix this issue is available in upstream:

From 1037ebbbd262227a91dfdd558159e345d4edf6b7 Mon Sep 17 00:00:00 2001
From: Ido Shamay <email address hidden>
Date: Mon, 2 Mar 2015 18:22:16 +0200
Subject: net/mlx4_en: Disbale GRO for incoming loopback/selftest packets

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/patch/drivers/net/ethernet/mellanox/mlx4?id=1037ebbbd262227a91dfdd558159e345d4edf6b7