Re: [Patch 1/1] x86 pci: Add option to not assign BAR's if not already assigned

[Bjorn Helgaas]

On Wednesday, June 02, 2010 01:31:18 am H. Peter Anvin wrote:
> On 06/01/2010 03:49 PM, Bjorn Helgaas wrote:
> >>
> >> BIOS still assigns the MMIO BAR's so the devices are alive.
> >
> > I'm sorry; I don't follow this.  BIOS assigns MMIO BARs regardless
> > of whether we have your patch.
> 
> I'm assuming that that Mike is implying is that the allocation code runs 
> out of I/O space and as a result shuts down the entire device.

Yeah, that's why I asked about a deeper problem.  There's not really a
"shut down this device" flag, so the only way I can think of that we
might make a device completely unusable is if we release all the device
resources and then fail to reassign them.

A concrete example, e.g., a dmesg log, would go a long ways toward
clarifying this.

Bjorn
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