Grant> Would it be a good guess that MSI-X support in the ia64
    Grant> kernel is broken? *sigh*

Yup, this type of error message is typical when the driver doesn't get
the interrupts it expects.  I suspect that the kernel MSI/MSI-X
support hardcodes some assumptions about addresses and message
contents that are only valid for Intel IA64 chipsets (see
drivers/pci/msi.h, specifically MSI_ADDRESS_HEADER etc.).

Does HP have any publicly available documentation about MSI on ZX1?
It would be great to finally have a reason to abstract the
system-dependent MSI stuff out of the current code.

 - R.
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