linux-kernel - Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link [LNKD]. Try pci=noacpi or acpi=off

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Date:   Fri, 30 Sep 2016 17:56:25 +0200
From:   Ondrej Zary <linux@...nbow-software.org>
To:     okaya@...eaurora.org
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-pci@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
        wim@....tudelft.nl, ravikanth.nalla@....com
Subject: Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link [LNKD]. Try pci=noacpi or acpi=off

On Friday 30 September 2016 15:14:42 okaya@...eaurora.org wrote:
> On 2016-09-30 02:44, Ondrej Zary wrote:
> > On Friday 30 September 2016, Sinan Kaya wrote:
> >> On 9/29/2016 2:00 PM, Ondrej Zary wrote:
> >> >> The previous two patches were in the right direction.
> >> >>
> >> >> > Can we also get the same output from 4.6 kernel with the attached
> >> >> > patch for the same machine you sent these?
> >> >
> >> > Here it is.
> >> >
> >> >> > Something about SCI still doesn't feel right.
> >> >> >
> >> >> > The IRQ assignment fails if the penalty is greater than
> >> >> > PIRQ_PENALTY_ISA_ALWAYS. This will happen if BIOS tells us to use
> >> >> > an IRQ and same IRQ is in use by the SCI.
> >>
> >> Thanks, I reverted penalize_sci function and dropped patch #1. Can you
> >> try
> >> this again?
> >
> > It seems to work, at least on one machine.
>
> Ok, that comfirms my suspicion. We are  having trouble detecting sci
> interrupt  type and we end up penalizing the wrong value.
>
> Can you try your other machines too?

Works on the 2nd one too.

> I need to do some research now.


-- 
Ondrej Zary

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