Messages in this thread | | | Subject | Re: Ignore disabled ROM resources at setup | From | Benjamin Herrenschmidt <> | Date | Tue, 30 Aug 2005 16:46:02 +1000 |
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On Mon, 2005-08-29 at 22:29 -0700, Linus Torvalds wrote: > > On Tue, 30 Aug 2005, Benjamin Herrenschmidt wrote: > > > > I was just testing a slightly different one that appear to fix the > > problem : > ... > > + rom_addr = region.start | (res->flags & PCI_REGION_FLAG_MASK); > > I worry about this one. It's not really correct. The low en bits are > "reserved", and while I don't know whether writing zero is always correct, > I do know that just writing the low 4 bits with the old value is a bit > strange. And the flags don't save the other bits. > > So I'd prefer either my previous diff, or one that just re-reads the bits > entirely, something like the appended..
Can you keep the part of my patch that adds error checking on the result of pci_assign_resource() ?
> What does the PCI spec say about the reserved bits? Do we have to save > them?
I didn't see anything special about them, but I may have missed it.
Ben.
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