On 07/08/2012 10:46 PM, Li Yang-R58472 wrote: >>> I don't understand, why is this just showing up now? What >>> changed to cause this? Couldn't that be the real problem here? >>> >> >> The issue is showing up because we now probe devices twice. >> Previously, we just probe devices once. But now we changed the way >> of pci init which makes pci controllers should be probed earlier >> than other devices. So we have to probe pci nodes separately. Probe >> more than once is the root cause of this issue. >> >> The pci patchset I mentioned please refer to: >> http://patchwork.ozlabs.org/patch/163742/ > > Let me try to clarify a little bit. The of platform bus normally > traverse the device tree to add all the devices. The change which > caused problem is that we need to probe PCIe RC devices at a earlier > stage of initialization. So we added these PCIe RC devices earlier > than the normal device tree traversal process. These PCIe RC devices > will be scanned again during the normal traversal and cause > duplicated devices being added. Our proposal is to deal with > duplicated devices automatically and make it possible to scan the > device tree multiple times for devices to be added.
What is making PCI need to be probed earlier? Perhaps deferred probe would work? Perhaps giving of_platform_populate an exclude list of compatible strings to skip would work. Rob -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
