On Thursday 13 December 2007 12:09:23 am Borislav Petkov wrote:
> On Wed, Dec 12, 2007 at 09:21:41AM -0700, Bjorn Helgaas wrote:
> > On Wednesday 12 December 2007 03:11:23 am Borislav Petkov wrote:
> > > On Tue, Dec 11, 2007 at 05:08:59PM -0700, Bjorn Helgaas wrote:
> > > > On Tuesday 11 December 2007 01:52:55 pm Borislav Petkov wrote:
> > > > > From what i can roughly tell so far it seems like an resource conflict between acpi and
> > > > > the pnp requested regions in your patch which result in the acpi_thermal code
> > > > > to read the wrong (0xff) temperature value and halt the machine, but i might be
> > > > > wrong on the details since acpi is such a big code chunk to swallow.
> > > >
> > I think Alexey is on the right track with the PCI resource allocation
> > failure.
>
> Then it should be the SMBus controller, PCI id 00:1f:3, which is having problems
> registering its io ports region 4, AFAICT.
Yes, it looks like the ioport region 0x540-0x55f is described both in
PNP and ACPI:
/sys/devices/pnp0/00:0d/resources:state = active
/sys/devices/pnp0/00:0d/resources:io 0x540-0x55f
/sys/devices/pnp0/00:0d/resources:io 0x400-0x47f
00:1f.3 SMBus: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 03)
Subsystem: ASUSTeK Computer Inc. Unknown device 1869
Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Interrupt: pin B routed to IRQ 0
Region 4: I/O ports at 0540 [size=32]
The PCI SMBus device was enabled by a quirk, asus_hides_smbus_lpc().
This quirk seems dangerous to me, and the comments above asus_hides_smbus
allude to problems similar to what you're seeing. It's obvious that a
lot of blood, sweat, and tears have gone into this quirk, so I'm not
suggesting that it's time to revert it, but I would be interested in
knowing whether the critical temperature problem goes away if we leave
the PCI device hidden, e.g., with the following patch:
Index: linux-mm/drivers/pci/quirks.c
===================================================================
--- linux-mm.orig/drivers/pci/quirks.c 2007-12-13 09:11:31.000000000 -0700
+++ linux-mm/drivers/pci/quirks.c 2007-12-13 09:12:27.000000000 -0700
@@ -1073,12 +1073,7 @@
pci_read_config_word(dev, 0xF2, &val);
if (val & 0x8) {
- pci_write_config_word(dev, 0xF2, val & (~0x8));
- pci_read_config_word(dev, 0xF2, &val);
- if (val & 0x8)
- printk(KERN_INFO "PCI: i801 SMBus device continues to play 'hide and seek'! 0x%x\n", val);
- else
- printk(KERN_INFO "PCI: Enabled i801 SMBus device\n");
+ printk(KERN_INFO "PCI: Leaving i801 SMBus device hidden\n");
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_0, asus_hides_smbus_lpc);
-
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