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Date:   Thu, 13 Apr 2017 22:03:28 +0300 (EEST)
From:   Meelis Roos <mroos@...ux.ee>
To:     Bjorn Helgaas <helgaas@...nel.org>
cc:     Linux Kernel list <linux-kernel@...r.kernel.org>,
        linux-pci@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: 4.11-rc*: PCI IRQ allocation broken

> > 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 :(

> 
> 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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