Andrew Morton wrote:
There was a patch floating around to ignore PnPACPI reservations which
conflict with PCI BARs, which appears to be what's happening in this
case. That patch originally worked for any board, but was later made
specific to a certain Supermicro motherboard which had the sata_nv
controller MMIO regions marked as reserved, preventing the driver from
loading. We may need a more general solution. See:
https://bugzilla.redhat.com/show_bug.cgi?id=313491
Thanks. If we were to remove the supermicro-specificity, would this be a
sufficiently general solution?
I think so. There was one objection that it introduced a dependency on
pnpacpi loading after PCI bus enumeration, though.
Linus also suggested that pnpacpi could be marking the resources as
"present but unused" so that drivers can request those regions but we
still prevent dynamically assigning resources into them.
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