Re: PCI device problem - MMCONFIG, cannot allocate resource region, resource collisions

Ivan Kokshaysky wrote:

No, it won't help. The 1M range (ff500000-ff5fffff) is more than enough.

Good catch, I didn't look close enough at the allocations of the devices under the bridge.

The reason why the D-Link resource is not getting assigned is rather
interesting: as Wayne wrote

Here is the D-LINK NIC:
# od -t x4 /sys/devices/pci0000:00/0000:00:14.4/0000:02:02.0/config

0000000 49011186 80b00117 00000011 00004010

			    ^^^^^^
which means that the device class is 0 (not defined).
And in drivers/pci/setup-bus.c we have

		/* Don't touch classless devices or host bridges or ioapics.  */
		if (class == PCI_CLASS_NOT_DEFINED ||
		    class == PCI_CLASS_BRIDGE_HOST)
			continue;

The short term fix would be to assign proper device class to D-Link NIC
using pci quirk...

I would like to try this, where do I find "pci quirk"?

Thanks,

Wayne



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