linux-kernel - Re: [PATCH] ACPI / IPMI: change warning to debug on timeout

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Message-ID: <65822175-1361-e688-bf7a-6c45d9b87649@acm.org>
Date:   Tue, 28 Mar 2017 17:45:25 -0500
From:   Corey Minyard <minyard@....org>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Sinan Kaya <okaya@...eaurora.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Timur Tabi <timur@...eaurora.org>,
        linux-arm-msm@...r.kernel.org,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "Zheng, Lv" <lv.zheng@...el.com>
Subject: Re: [PATCH] ACPI / IPMI: change warning to debug on timeout

On 03/28/2017 05:06 PM, Rafael J. Wysocki wrote:
> On Tue, Mar 28, 2017 at 10:01 PM, Corey Minyard <minyard@....org> wrote:
>> On 03/25/2017 09:08 AM, Sinan Kaya wrote:
>>> On 3/24/2017 10:55 PM, Corey Minyard wrote:
>>>> Why would a timeout for a message be expected?  The BMC should
>>>> at least respond with an error for an incorrect message.
>>> Let me add some more context...
>>>
>>> In this particular case, the FRU ID that I was trying to access was
>>> correct.
>>>
>>> Platform supports PCIe hotplug. The FRU is embedded into the HW that
>>> is being removed. That's what I mean by non-existent.
>>>
>>> When the device is ejected and a FRU command is executed, BMC times out
>>> reaching to the FRU on the device.
>>>
>>> When the device is inserted, everything works as expected.
>>
>> I haven't added this yet.  Someone who knows more about the ACPI side of
>> IPMI
>> should probably comment.  So I've added Lv Zheng.
>>
>> This is ok with me, though.  If you remove a management controller, a
>> timeout is
>> expected.  However, if the management controller is still present, a timeout
>> is
>> probably not the best error code, "destination unavailable" is probably a
>> better
>> choice.
>>
>> So:
>>
>> Acked-by: Corey Minyard <cminyard@...sta.com>
>>
>> -corey
> FWIW, this change is fine by me, so please feel free to route this
> through the IPMI tree along with the other patch from Sinan.

Ok, done, with your ack added.

Thanks,

-corey

> Thanks,
> Rafael