On Thu, Jun 27, 2013 at 04:02:29PM +0300, Mika Westerberg wrote:
> On Wed, Jun 26, 2013 at 05:37:58PM -0600, Bjorn Helgaas wrote:
> > > @@ -707,8 +702,11 @@ static int __ref enable_device(struct acpiphp_slot
> > > *slot)
> > > dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
> > > max = pci_scan_bridge(bus, dev, max,
> > > pass);
> > > if (pass && dev->subordinate) {
> > > - check_hotplug_bridge(slot, dev);
> > > -
> > > pcibios_resource_survey_bus(dev->subordinate);
> > > + if (!dev->subordinate->is_added) {
> > > +
> > > check_hotplug_bridge(slot, dev);
> > > +
> > > pcibios_resource_survey_bus(
> > > + dev->subordinate);
> >
> > It's a shame that pcibios_resource_survey_bus() can't be called twice.
> > It would be nice if it were smart enough to notice on the second call
> > that "oh, resources have already been assigned, so there's nothing
> > more to be done." Did you look to see whether that's feasible?
>
> I didn't but now that you mentioned I went and checked. I'm pretty sure we
> can handle it there in the next revision and drop this change.
With following patch that fixes pcibios_resource_survey_bus() Thunderbolt
seems to be working just fine (and the quirk is gone).
If it looks okay, I'll include it into the next iteration of the patches.
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index 94919e3..db6b1ab 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -210,6 +210,8 @@ static void pcibios_allocate_bridge_resources(struct
pci_dev *dev)
r = &dev->resource[idx];
if (!r->flags)
continue;
+ if (r->parent) /* Already allocated */
+ continue;
if (!r->start || pci_claim_resource(dev, idx) < 0) {
/*
* Something is wrong with the region.
@@ -318,6 +320,8 @@ static void pcibios_allocate_dev_rom_resource(struct
pci_dev *dev)
r = &dev->resource[PCI_ROM_RESOURCE];
if (!r->flags || !r->start)
return;
+ if (r->parent) /* Already allocated */
+ return;
if (pci_claim_resource(dev, PCI_ROM_RESOURCE) < 0) {
r->end -= r->start;
--
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