linux-kernel - Re: [PATCH] acpi: apei: fix GHES estatus iteration

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Date:   Fri, 11 Aug 2017 06:04:16 +0800
From:   gengdongjiu <gengdongjiu@...wei.com>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Will Deacon <will.deacon@....com>
CC:     Tyler Baicar <tbaicar@...eaurora.org>, <lenb@...nel.org>,
        <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>, <austinwc@...eaurora.org>
Subject: Re: [PATCH] acpi: apei: fix GHES estatus iteration



On 2017/8/9 8:52, Rafael J. Wysocki wrote:
> On Tuesday, August 8, 2017 6:32:20 PM CEST Will Deacon wrote:
>> On Thu, Aug 03, 2017 at 03:32:25PM -0600, Tyler Baicar wrote:
>>> Currently iterating through the GHES estatus blocks does not
>>> take into account the new generic data v3 structure size. This
>>> can result in garbage non-standard trace events to be triggered
>>> since the loop will not properly iterate through the estatus
>>> blocks and not properly terminate.
>>>
>>> Update the GHES estatus iteration to properly increment through
>>> the estatus blocks similar to how the CPER estatus printing
>>> iterates through them.
>>>
>>> Fixes: bbcc2e7b642e ("ras: acpi/apei: cper: add support for generic data v3 structure")
I do not think it has relationship with this "bbcc2e7b642e", the root cause is that it
does not consider the acpi_hest_generic_data_v300, this code exists long long time ago.

so please also review this patch:
https://lkml.org/lkml/2017/8/10/747

previously I do not see Tyler's this modification, just know see it.


>>> Signed-off-by: Tyler Baicar <tbaicar@...eaurora.org>
>>> Tested-by: Austin Christ <austinwc@...eaurora.org>
>>> ---
>>>  drivers/acpi/apei/apei-internal.h | 5 -----
>>>  drivers/acpi/apei/ghes.c          | 8 +++++++-
>>>  2 files changed, 7 insertions(+), 6 deletions(-)
>>
>> Whilst much of the initial code here went through the arm64 tree in the
>> previous merge window, I'm assuming that Boris will take this fix via his
>> tree (likewise for "[PATCH V2] acpi: apei: clear error status before
>> acknowledging the error").
> 
> Actually I will if Boris ACKs these.
> 
> Thanks,
> Rafael
> 
> 
> .
>