Re: [PATCH] xen/arm: fix SBDF calculation for vPCI MMIO handlers [and 2 more messages]

[Oleksandr Andrushchenko <Oleksandr_Andrushchenko@xxxxxxxx>]

On 01.11.21 23:06, Stefano Stabellini wrote:
> On Mon, 1 Nov 2021, Ian Jackson wrote:
>> Julien Grall writes ("Re: [PATCH] xen/arm: fix SBDF calculation for vPCI 
>> MMIO handlers"):
>>> On 28/10/2021 16:54, Ian Jackson wrote:
>>>> There are a number of patches that I'm getting CC'd on related to ARM
>>>> and vpci (according to the Subject).  Are these targeted for 4.16 ?
>>>> Most of them don't have 4.16 Subject tags.
>>> Oleksandr wants this patch to be included for 4.16 but forgot to tag it
>>> properly.
>> Oh yes.  However,
>>
>> 1. I also wrote this:
>>
>>>> I am finding it difficult to see the wood for the trees.
>>>> It would be really helpful if these vpci fixes were collected
>>>> together into a series.
>> Can someone please confirm whether this is the only vpci-related patch
>> that ought to be on my radar for 4.16 ?
>>
>> 2. I have not had a reply to my question on Wednesday in
>> <24953.34635.645112.279110@xxxxxxxxxxxxxxxxxxxxxxxx>:
>>
>>    Um, can you explain what the practical impact is of not taking this
>>    patch for 4.16 ?  As I understand it vpci for ARM is non-functional in
>>    4.16 and this is not expected to change ?  So there would be no
>>    benefit to users, and taking the patch would add small but nonzero
>>    risk ?
>>
>> I need this information to decide whether a release-ack is
>> appropriate.
>>
>> Note that we are in code freeze so all patches, including bugfixes,
>> need my ack.
> Hi Ian,
>
> This patch [1] is a straightforward 2 lines fix for vpci on ARM.  There
> is no risk for the release as the source file affected only builds when
> CONFIG_HAS_VPCI is enabled, and it is currently disabled on ARM.
>
> At the same time, as we know vpci is not complete in 4.16 anyway, so the
> counter argument is that we don't need to fix it.
>
> Given how trivial the fix is, and that it cannot break the build or
> runtime, I would take it.
Thank you,
I can re-send the patch with the updated commit message (Julien),
but I still have no R-b's for the patch, so not sure if it is worth it
>
> Cheers,
>
> Stefano
>
>
> [1] https://marc.info/?l=xen-devel&m=163532307715435
>