linux-kernel - Re: 4.11-rc*: PCI IRQ allocation broken

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Date:   Thu, 13 Apr 2017 14:20:16 -0500
From:   Bjorn Helgaas <bhelgaas@...gle.com>
To:     Meelis Roos <mroos@...ux.ee>
Cc:     Bjorn Helgaas <helgaas@...nel.org>,
        Linux Kernel list <linux-kernel@...r.kernel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>
Subject: Re: 4.11-rc*: PCI IRQ allocation broken

On Thu, Apr 13, 2017 at 2:03 PM, Meelis Roos <mroos@...ux.ee> wrote:
>> > This happens on my HP Compaq 8100 Elite SFF PC. While 4.10 works fine,
>> > 4.11.-rc5 and at least back to 4.10.0-10770-g2d6be4abf514 fail to assign
>> > PCI IRQ to multiple devices (no GSI messages in the dmesg). This results
>> > in mouse in one USB port working and keyboard in another USB port not
>> > working, reproducibly.
>> >
>> > Will bisect.
>>
>> Thanks a lot for the report, Meelis, and I apologize for the inconvenience.
>> I opened https://bugzilla.kernel.org/show_bug.cgi?id=195319 to track this,
>> marked it as a regression, and attached your v4.11-rc5 dmesg to it.
>
> Bisecting got stuck - I reached a state with about 5-6 steps left when I
> got an unbootable kernel. Went there yesterday, restarted a good kernel,
> skipped the kernel and left. When I rebooted into the next bisect
> kernel, it has hung again. Will see when I get to go there.
> Unfortunately I did not remember to take the intermediate bisect state
> with me :(

I *think* the ACPI guys found the problem; at least Michael Marlen
<michael@...haelmarley.com> reported the same problem and that it was
fixed by reverting 57707a9a7780 ("ACPICA: Resources: Not a valid
resource if buffer length too long").

Sorry, I should have added you the cc list in bugzilla right away.

>> Something seems broken in ACPI.  There are a bunch of warnings, and I
>> think the PCI IRQ problem is a consequence of the fact that the
>> PNP0A08 _CRS evaluation failed, and we probably don't bother looking
>> for a _PRT under that bridge.
>>
>> > Linux version 4.11.0-rc5-00033-g308ac7563944 (mroos@...metheus) (gcc version 6.3.0 20170321 (Debian 6.3.0-11) ) #64 SMP Wed Apr 5 12:29:53 EEST 2017
>> > Command line: BOOT_IMAGE=/boot/vmlinuz-4.11.0-rc5-00033-g308ac7563944 root=/dev/sda1 ro
>> > ...
>> > ACPI BIOS Warning (bug): Optional FADT field Pm2ControlBlock has valid Address but zero Length: 0x0000000000000050/0x0 (20170119/tbfadt-658)
>> > ACPI BIOS Warning (bug): Invalid length for FADT/Pm2ControlBlock: 0, using default 8 (20170119/tbfadt-708)
>> > ...
>> > acpi LNXCPU:00: Invalid PBLK length [7]
>> > acpi LNXCPU:01: Invalid PBLK length [7]
>> > acpi LNXCPU:02: Invalid PBLK length [7]
>> > acpi LNXCPU:03: Invalid PBLK length [7]
>> > acpi PNP0A08:00: [Firmware Bug]: no secondary bus range in _CRS
>> > ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
>> > acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI]
>> > ACPI BIOS Error (bug): \_SB.PCI0._OSC: Excess arguments - ASL declared 5, ACPI requires 4 (20170119/nsarguments-189)
>> > ACPI Error: [CAPD] Namespace lookup failure, AE_ALREADY_EXISTS (20170119/dsfield-211)
>> > ACPI Error: Method parse/execution failed [\_SB.PCI0._OSC] (Node ffff880113031668), AE_ALREADY_EXISTS (20170119/psparse-543)
>> > acpi PNP0A08:00: _OSC failed (AE_ALREADY_EXISTS); disabling ASPM
>> > acpi PNP0A08:00: [Firmware Info]: MMCONFIG for domain 0000 [bus 00-3f] only partially covers this bridge
>> > acpi PNP0A08:00: failed to parse _CRS method, error code -5
>> > acpi PNP0A08:00: Bus 0000:00 not present in PCI namespace
>> > ...
>> > PCI: Discovered peer bus 00
>> > PCI: root bus 00: using default resources
>> > PCI: Probing PCI hardware (bus 00)
>> > ...
>> > ACPI: \: failed to evaluate _DSM (0x1001)
>> > ...
>> > PCI host bridge to bus 0000:00
>> > pci_bus 0000:00: root bus resource [io  0x0000-0xffff]
>> > pci_bus 0000:00: root bus resource [mem 0x00000000-0xfffffffff]
>> > pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
>> > ...
>> > PCI: Discovered peer bus 3f
>> > PCI: root bus 3f: using default resources
>> > PCI: Probing PCI hardware (bus 3f)
>> > ACPI: \: failed to evaluate _DSM (0x1001)
>> > ...
>> > pnp 00:00: Plug and Play ACPI device, IDs PNP0b00 (active)
>> > pnp 00:01: can't evaluate _CRS: 12316
>> > ...
>> > [drm] ACPI BIOS requests an excessive sleep of 4294705151 ms, using 1500 ms instead
>>
>
> --
> Meelis Roos (mroos@...ux.ee)
> --
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