[Bug 104856] `intel_hpd_cancel_work` takes around 1 s during suspend on Dell XPS 13 9360

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104856

--- Comment #9 from Paul Menzel <pmenzel+bugs.freedesktop at molgen.mpg.de> ---
(In reply to Imre Deak from comment #8)
> (In reply to Paul Menzel from comment #7)
> > (In reply to Imre Deak from comment #6)
> > > The problem is that AUX interrupts get disabled too early during suspend,
> > > after which the driver still performs AUX transfers. Without interrupts
> > > these transfers will be slow (each taking a 10ms timeout overhead). The
> > > solution would be to do more fine-grained interrupt disabling during suspend.
> > 
> > What commit introduced this regression?
> 
> I don't think this is a regression, we never had support for keeping only
> AUX interrupts enabled. So it needs to be implemented.

I can only say, that the delay was around 350 ms in the past, see bug #99650
[1]. So there is a regression in 4.15 in my opinion.

[1] https://bugs.freedesktop.org/show_bug.cgi?id=99650

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