Re: [PATCH 1/2] x86, microcode: Do Intel microcode revision checksigned

[H. Peter Anvin]

On 12/10/2013 07:55 AM, Andi Kleen wrote:
> On Tue, Dec 10, 2013 at 10:30:00AM -0500, Konrad Rzeszutek Wilk wrote:
>> On Fri, Dec 06, 2013 at 01:04:02PM -0800, Andi Kleen wrote:
>>> From: Andi Kleen <ak@xxxxxxxxxxxxxxx>
>>>
>>> The Intel SDM Vol 3 9.11.1 Microcode update states that
>>> the update revision field is signed. However we do the comparison
>>> unsigned, as the comparison gets promoted.
>>>
>>> Use a cast to really do a signed comparison of the microcode
>>> revision.
>>
>> Why not just update the struct?
> 
> It would need updating various printks I think. So I chose the simpler cast,
> as that already solves the comparison problem.
> 
> -Andi
> 

Updating the printks sounds like the right thing, too.

	-hpa

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