Re: [Xen-devel] [BUG] pci-passthrough generates "xen:events: Failed to obtain physical IRQ" for some devices

[Marek Marczykowski-GÃrecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>]

On Mon, Feb 01, 2016 at 09:50:53AM -0500, Konrad Rzeszutek Wilk wrote:
> > The second bullet looks at first pretty interesting from this PoV,
> > seeÂhttp://xenbits.xen.org/xsa/advisory-157.htmlÂfor info on the XSA and
> > the various patches. Konrad is on the CC already so hopefully he has some
> > ideas.
> 
> Thanks. I will try to reproduce this with the upstream kernel first as
> those patches are there.

According to one Qubes OS user report[1], the bug was introduced between
version, which differs only by XSA-155 patches (including one for
pciback), especially not XSA-157. 
Maybe on some code path, some value is not copied back to pdev->sh_info->op?

[1]
https://groups.google.com/d/msgid/qubes-devel/e64792c5-b9af-42ac-8d67-adce426b9dcb%40googlegroups.com

-- 
Best Regards,
Marek Marczykowski-GÃrecki
Invisible Things Lab
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

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