Re: PCI Failed to allocate mem for PCI ROM

On Sat, Jan 12, 2008 at 12:27:05AM -0700, Grant Grundler wrote:

Looking at setup-bus.c:pci_bridge_check_ranges(), I'm concluding that:
[7] is IO Range.
[8] is MMIO
[9] is Prefetchable MMIO
[10] no clue...maybe used by host PCI bus controllers.

#10 is for cardbus bridges, IIRC.

0x100000 is 1MB and would be the minimum MMIO range that can be allocated.
So that looks right too. Probably need to find out what is allocating
0xe0000000 instead.

I believe that the setup-bus code just tried to allocate 1M ROM of some
device using prefetchable window of the bridge 0000:00:00.0. That failed,
probably because there is no MEM space left on the root bus, which is
perfectly OK. Then, the ROM might be successfully allocated in the
non-prefetchable MMIO space.

So, I don't see any problem in this situation. The only thing I could
suggest is to lower the log level in that message from KERN_ERR to
KERN_WARNING...

Ivan.