Bjorn Helgaas schreef op ma 10-03-2014 om 12:24 [-0600]: > Thanks. Can you try the patch below? I think it should fix the problem. > > > PCI: Don't check resource_size() in pci_bus_alloc_resource() > > From: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> > > When resource_size_t is 32 bits wide, e.g., when CONFIG_PHYS_ADDR_T_64BIT > is not defined, resource_size() on [mem 0x00000000-0xffffffff] returns 0 > because (r->end - r->start + 1) overflows. > > Therefore, we can't use "resource_size() == 0" to decide that allocation > from this resource will fail. allocate_resource() should fail anyway if it > can't satisfy the address constraints, so we should just depend on that. > > A [mem 0x00000000-0xffffffff] bus resource is obviously not really valid, > but we do fall back to it as a default when we don't have information about > host bridge apertures. > > Link: https://bugzilla.kernel.org/show_bug.cgi?id=71611 > Fixes: f75b99d5a77d PCI: Enforce bus address limits in resource allocation > Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> > --- > drivers/pci/bus.c | 2 -- > 1 file changed, 2 deletions(-) > > diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c > index 00660cc502c5..38901665c770 100644 > --- a/drivers/pci/bus.c > +++ b/drivers/pci/bus.c > @@ -162,8 +162,6 @@ static int pci_bus_alloc_from_region(struct pci_bus *bus, struct resource *res, > > avail = *r; > pci_clip_resource_to_region(bus, &avail, region); > - if (!resource_size(&avail)) > - continue; > > /* > * "min" is typically PCIBIOS_MIN_IO or PCIBIOS_MIN_MEM to I've applied your patch on top of v3.14-rc6. The boot warning is gone. And /proc/iomem once again has the lines: [...] 80000000-801fffff : PCI Bus 0000:02 80200000-8027ffff : 0000:00:02.1 80280000-80280fff : Intel Flush Page [...] Which is what we want, don't we? A bit of doubt is caused by two new boot time messages: pnp 00:00: unknown resource type 10 in _CRS pnp 00:00: can't evaluate _CRS: 1 But I haven't yet tried v3.14-rc6 without your patch, so these might be unrelated. They're unclear to me, anyway. Thanks, Paul Bolle -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
