From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1751371AbeDNPsG convert rfc822-to-8bit (ORCPT <rfc822;w@1wt.eu>);
        Sat, 14 Apr 2018 11:48:06 -0400
Received: from youngberry.canonical.com ([91.189.89.112]:48240 "EHLO
        youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1751143AbeDNPsE (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Sat, 14 Apr 2018 11:48:04 -0400
X-Google-Smtp-Source: AIpwx480Jy5SpsyuLo7IP1XWSrApYVqLoPyJ2QEmvQIUV0314DLU0Jd2fkCfwoq8HkygkUX3pBzlbA==
Content-Type: text/plain;
        charset=utf-8
Mime-Version: 1.0 (Mac OS X Mail 11.3 \(3445.6.18\))
Subject: Re: tg3 crashes under high load, when using 100Mbits
From: Kai-Heng Feng <kai.heng.feng@canonical.com>
In-Reply-To: <48279E27-4FCB-4A3F-8F4A-E26581020D2A@canonical.com>
Date: Sat, 14 Apr 2018 23:47:56 +0800
Cc: Siva Reddy Kallam <siva.kallam@broadcom.com>,
        Prashant Sreedharan <prashant@broadcom.com>,
        Michael Chan <mchan@broadcom.com>,
        Linux Netdev List <netdev@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Stanley Hsiao <stanley.hsiao@canonical.com>,
        Tim Chen <tim.chen119@canonical.com>
Content-Transfer-Encoding: 8BIT
Message-Id: <31572B4A-FD0A-4780-9660-C4C74C7D37AE@canonical.com>
References: <CA+oDAx908Dpn93-c4ogS5F1XZJri9GC_WaFR8wuDKO47kygB5w@mail.gmail.com>
 <48279E27-4FCB-4A3F-8F4A-E26581020D2A@canonical.com>
To: Satish Baddipadige <satish.baddipadige@broadcom.com>
X-Mailer: Apple Mail (2.3445.6.18)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Hi Satish,

> On 2018Mar21, at 00:57, Kai-Heng Feng <kai.heng.feng@canonical.com> wrote:
> 
> Satish Baddipadige <satish.baddipadige@broadcom.com> wrote:
> 
>> On Thu, Feb 15, 2018 at 7:37 PM, Siva Reddy Kallam
>> <siva.kallam@broadcom.com> wrote:
>>> On Mon, Feb 12, 2018 at 10:59 AM, Siva Reddy Kallam
>>> <siva.kallam@broadcom.com> wrote:
>>>> On Fri, Feb 9, 2018 at 10:41 AM, Kai Heng Feng
>>>> <kai.heng.feng@canonical.com> wrote:
>>>>> Hi Broadcom folks,
>>>>> 
>>>>> We are now enabling a new platform with tg3 nic, unfortunately we observed
>>>>> the bug [1] that dated back to 2015.
>>>>> I tried commit 4419bb1cedcd ("tg3: Add workaround to restrict 5762 MRRS to
>>>>> 2048”) but it does’t work.
>>>>> 
>>>>> Do you have any idea how to solve the issue?
>>>>> 
>>>>> [1] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1447664
>>>>> 
>>>>> Kai-Heng
>>>> Thank you for reporting. We will check and update you.
>>> With link aware mode, the clock speed could be slow and boot code does not
>>> complete within the expected time with lower link speeds. Need to override
>>> and the clock in driver. We are checking the feasibility of adding
>>> this in driver or firmware.
>> 
>> Hi Kai-Heng,
>> 
>> Can you please test the attached patch?
> 
> I built a kernel and asked affected users to try.

Users reported that the crash still happens with the patch.

Kai-Heng

> 
> Thanks for your work.
> 
> Kai-Heng
> 
>> 
>> Thanks,
>> Satish
>> <tg3_5762_clock_override.patch>