Re: pci 0000:01:00.0: BAR 6: no parent found for of device [0xfffe0000-0xffffffff]

[Jesse Barnes <jbarnes@virtuousgeek.org>]

On Wed, 24 Jun 2009 10:27:42 -0700
Justin Mattock <justinmattock@gmail.com> wrote:

> (just pulled the latest git)
> And am seeing this:
> 
> 
> [    0.696001] pci 0000:01:00.0: BAR 6: no parent found for of device
> [0xfffe0000-0xffffffff]
> [    0.696010] pci 0000:02:00.0: BAR 6: no parent found for of device
> [0xfffe0000-0xffffffff]
> [    0.696069] pci 0000:00:01.0: PCI bridge, secondary bus 0000:01
> [    0.696074] pci 0000:00:01.0:   IO window: 0x3000-0x3fff
> [    0.696081] pci 0000:00:01.0:   MEM window: 0x50300000-0x503fffff
> [    0.696087] pci 0000:00:01.0:   PREFETCH window:
> 0x00000040000000-0x00000047ffffff
> [    0.696096] pci 0000:00:1c.0: PCI bridge, secondary bus 0000:02
> [    0.696102] pci 0000:00:1c.0:   IO window: 0x2000-0x2fff
> [    0.696111] pci 0000:00:1c.0:   MEM window: 0x50200000-0x502fffff
> [    0.696118] pci 0000:00:1c.0:   PREFETCH window:
> 0x50500000-0x505fffff [    0.696126] pci 0000:00:1c.1: PCI bridge,
> secondary bus 0000:03 [    0.696130] pci 0000:00:1c.1:   IO window:
> disabled [    0.696138] pci 0000:00:1c.1:   MEM window:
> 0x50100000-0x501fffff [    0.696145] pci 0000:00:1c.1:   PREFETCH
> window: disabled [    0.696152] pci 0000:00:1c.2: PCI bridge,
> secondary bus 0000:04 [    0.696158] pci 0000:00:1c.2:   IO window:
> 0x1000-0x1fff [    0.696167] pci 0000:00:1c.2:   MEM window:
> 0x4c100000-0x500fffff [    0.696174] pci 0000:00:1c.2:   PREFETCH
> window: 0x00000048000000-0x0000004bffffff
> [    0.696186] pci 0000:00:1e.0: PCI bridge, secondary bus 0000:0c
> [    0.696190] pci 0000:00:1e.0:   IO window: disabled
> [    0.696198] pci 0000:00:1e.0:   MEM window: 0x4c000000-0x4c0fffff
> [    0.696205] pci 0000:00:1e.0:   PREFETCH window: disabled
> [    0.696219] pci 0000:00:01.0: PCI INT A -> GSI 16 (level, low) ->
> IRQ 16 [    0.696225] pci 0000:00:01.0: setting latency timer to 64
> [    0.696235] pci 0000:00:1c.0: PCI INT A -> GSI 17 (level, low) ->
> IRQ 17 [    0.696243] pci 0000:00:1c.0: setting latency timer to 64
> [    0.696254] pci 0000:00:1c.1: PCI INT B -> GSI 16 (level, low) ->
> IRQ 16 [    0.696261] pci 0000:00:1c.1: setting latency timer to 64
> [    0.696273] pci 0000:00:1c.2: PCI INT C -> GSI 18 (level, low) ->
> IRQ 18 [    0.696280] pci 0000:00:1c.2: setting latency timer to 64
> [    0.696437] pci 0000:00:1e.0: power state changed by ACPI to D0
> [    0.696446] pci 0000:00:1e.0: setting latency timer to 64
> 
> 
> Is this good or bad?
> (BAR 6: no parent found for of device)

There have been a few changes in this area recently, notably

commit 9e9f46c44e487af0a82eb61b624553e2f7118f5b
Author: Jesse Barnes <jbarnes@virtuousgeek.org>
Date:   Thu Jun 11 10:58:28 2009 -0700

    PCI: use ACPI _CRS data by default

and some related to

commit ff54250a0ebab7f90a5f848a0ba63f999830c872
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Sat Apr 18 21:44:24 2009 -0700

    Remove 'recurse into child resources' logic from ...

The first you can control with the nocrs boot param, the other ones
will have to be bisected through though...

-- 
Jesse Barnes, Intel Open Source Technology Center