linux-kernel - Re: [PATCH V3] acpi: apei: clear error status before acknowledging the error

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Message-ID: <a7496f34-4ea9-33a2-0e65-f7e3aa49deb0@codeaurora.org>
Date:   Thu, 21 Sep 2017 09:27:06 -0600
From:   Tyler Baicar <tbaicar@...eaurora.org>
To:     rjw@...ysocki.net
Cc:     Borislav Petkov <bp@...en8.de>, lenb@...nel.org,
        will.deacon@....com, james.morse@....com, bp@...e.de,
        shiju.jose@...wei.com, geliangtang@...il.com,
        andriy.shevchenko@...ux.intel.com, tony.luck@...el.com,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V3] acpi: apei: clear error status before acknowledging
 the error

On 9/13/2017 8:40 AM, Baicar, Tyler wrote:
> On 8/29/2017 2:16 AM, Borislav Petkov wrote:
>> On Mon, Aug 28, 2017 at 10:53:41AM -0600, Tyler Baicar wrote:
>>> Currently we acknowledge errors before clearing the error status.
>>> This could cause a new error to be populated by firmware in-between
>>> the error acknowledgment and the error status clearing which would
>>> cause the second error's status to be cleared without being handled.
>>> So, clear the error status before acknowledging the errors.
>>>
>>> Also, make sure to acknowledge the error if the error status read
>>> fails.
>>>
>>> V3: Seperate check for -ENOENT return value
>>>
>>> V2: Only send error ack if there was an error populated
>>>      Remove curly braces that are no longer needed
>>>
>>> Signed-off-by: Tyler Baicar <tbaicar@...eaurora.org>
>>> ---
>>>   drivers/acpi/apei/ghes.c | 16 +++++++++-------
>>>   1 file changed, 9 insertions(+), 7 deletions(-)
>> Reviewed-by: Borislav Petkov <bp@...e.de>
> Hello Rafael,
>
> Were you able to apply this patch?
I haven't heard anything on this patch. It would be great to have it in 
4.14 :)

Thanks,
Tyler