Re: [2.6.34-rc1 REGRESSION] ahci 0000:00:1f.2: controller resetfailed (0xffffffff)

From: Andy Isaacson
Date: Wed Apr 07 2010 - 00:13:42 EST

On Tue, Apr 06, 2010 at 09:59:43PM -0600, Bjorn Helgaas wrote:
> > I suspect it's due to:
> >
> > [ 3.094038] pci 0000:00:1f.2: no compatible bridge window for [mem 0xff970000-0xff9707ff]
> > [ 3.103001] pci 0000:00:1f.2: can't reserve [mem 0xff970000-0xff9707ff]
> Thanks a lot for reporting this!
> No need to bisect it. I'm pretty sure 2.6.34-rc1 will boot fine if you
> use "pci=use_crs" (obviously that's only a temporary workaround until we
> fix the real problem).

pci=nocrs worked on 2.6.34-rc3-00299-g0fdf867. I won't be back in front
of the machine to try use_crs until Thursday.

> put AHCI device, so we moved the AHCI device. Unfortunately, we put it
> at [mem 0x000a0000-0x000a07ff], which wasn't a very good choice because
> that's probably already used by a VGA device.

The machine has one VGA controller exposed currently; there may be
another integrated Intel video controller on the motherboard and
disabled by the BIOS.

01:00.0 VGA compatible controller: nVidia Corporation Quadro NVS 290 (rev a1) (prog-if 00 [VGA controller])
Subsystem: nVidia Corporation Device 0492
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at fc000000 (32-bit, non-prefetchable) [size=16M]
Memory at d0000000 (64-bit, prefetchable) [size=256M]
Memory at fa000000 (64-bit, non-prefetchable) [size=32M]
I/O ports at dc80 [size=128]
Expansion ROM at fde00000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: nouveau

(this is from the pci=nocrs boot.)

> If you happen to have Windows on this box, I'd love to know whether *it*
> moves the AHCI device, too, or whether Windows interprets the BIOS
> information differently than we do. If you have Windows and can collect
> screenshots of the Device Manager resources for the PCI bus and the AHCI
> controller, that would be a good start.

The machine only has Linux installed, but I may have access to another
T3400 that can dual-boot. Any preference for XP versus Win7?

> Would you mind trying the patch below and the patch and kernel args
> here:
> This will (1) reserve the VGA area, so we should put the AHCI device
> elsewhere, and (2) collect a few more details about exactly what the
> BIOS is reporting.

I'll try that on Thursday.

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