Re: 2.6.13-rc3-mm3

[Ivan Kokshaysky <ink@jurassic.park.msu.ru>]

On Tue, Aug 02, 2005 at 10:11:40AM -0700, Linus Torvalds wrote:
> So I think it would be much easier to just make the change in
> "pci_bus_alloc_resource()", and say that if the parent resource that we're
> testing starts at some non-zero value, we just use that instead of "min"  
> when we call down to allocate_resource(). That gets it for MEM resources 
> too.

Cool! I think it's the way to go.

> Something like the following (also _totally_ untested, but even simpler 
> than yours). It basically says: if the parent resource starts at non-zero, 
> we use that as the starting point for allocations, otherwise the passed-in 
> value.

Tested on alpha. Initially I was concerned a bit about architectures
where resources _never_ start at zero (due to some specific bus to
resource conversions), but this change is just a no-op for them.

> That, together with changing PCIBIOS_MIN_IO to 0x2000 (or even 0x4000)  
> might be the ticket...

Definitely 0x4000. Then we can get rid of PCIBIOS_MIN_CARDBUS_IO which
was introduced exactly for this reason, I guess.

Ivan.