Hello.

Benjamin Herrenschmidt wrote:

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On Tue, Dec 05, Benjamin Herrenschmidt wrote:

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Olaf, can you give me a dump of /proc/ioports ? What is sitting at 0 on
that PCI bus ?

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with IDE=y

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==> /proc/ioports <==
00000000-0000001f : dma1

So it's indeed colliding with the cruft above.

I reckon it's a bug in the firmware of this machine.

Add to pseries/pci.c a quirk for that chipset (don't forget to test for
machine_is(pseries) in the quirk as they get called for all platforms in
a combo kernel. The quirk shall check if resource 6 has a 0 base and
clear the size as Alan suggested (possibly setting the UNSET flag as
well).

    Erm, I suspect it's either one or another -- you probably need to keep the 
size intact for resource marked IORESOURCE_UNSET. At least that's what the 
other code does...

Ben.

WBR, Sergei