Re: Linux MIPS PCI resource sanity check

[Sergei Shtylyov <sshtylyov@ru.mvista.com>]

Michael Buesch wrote:

> There's a sanity check in pcibios_enable_resources() that looks like this:

> 	r = &dev->resource[idx];
> 	if (!r->start && r->end) {
> 		printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev));
> 		return -EINVAL;
> 	}
> 
> What is this check actually doing?

   It makes sure that a PCI resource is allocated (base of 0 means that it's 
unallocated due to previously detected resource conlict (or some other reason).

> It triggers for me on a BCM4318 device which is behind a BCM4710 PCI bridge.
> r->start is 0 and r->end is 0x1FFF when this triggers.
> If I simply comment out that check the device is detected correctly
> and seems to initialize just fine.

    No, that failnig resource should be relocated.

WBR, Sergei