Re: [PATCH] cardbus: revert IO window limit

[Daniel Ritz]

> Ok. We don't actually have any quirks at all for the 82440MX, and that's 
> almost certainly _not_ because it doesn't do something strange (all Intel 
> host bridges have magic IO ranges), but simply because we haven't hit it 
> yet.
> 
> And I can't find the docs for the PCI config space for that dang thing.
> 
> I bet that there's some magic SMBus IO-range that the 440MX decodes using 
> a special magic config setting.
> 
> Has anybody found the config space docs for the 82440MX? 

nope. but from the docs available i would _guess_ this thing is really
similar to the 82443BX/82371AB combination. at least the SMBus base address
register is hidden at the very same place (32bit at 0x90 in function 3 of the
"south" brigde)...so the attached little patch might be enough to fix things...

Alessio, could you try that one on top of a kernel that shows the problem?

rgds
-daniel

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 4364d79..1d26a64 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -401,6 +401,8 @@ static void __devinit quirk_piix4_acpi(s
 	piix4_io_quirk(dev, "PIIX4 devres J", 0x7c, 1 << 20);
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82371AB_3,	quirk_piix4_acpi );
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82443MX_3,	quirk_piix4_acpi );
+
 
 /*
  * ICH4, ICH4-M, ICH5, ICH5-M ACPI: Three IO regions pointed to by longwords at
-
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