On Fri, Feb 15, 2013 at 4:39 PM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote: > On Thu, Feb 14, 2013 at 5:50 PM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote: >> On Tue, Feb 12, 2013 at 12:22 PM, Rafael J. Wysocki <rjw@xxxxxxx> wrote: >>> On Tuesday, February 12, 2013 11:11:23 AM Yinghai Lu wrote: >>>> Peter Hurley found "irq 18 nobody cared" with pci-next, and dmesg has >>>> >>>> [ 8.983246] pci 0000:00:1e.0: can't derive routing for PCI INT A >>>> [ 8.983600] snd_ctxfi 0000:09:02.0: PCI INT A: no GSI - using ISA IRQ 5 >>>> >>>> bisect to >>>> | commit 4f535093cf8f6da8cfda7c36c2c1ecd2e9586ee4 >>>> | PCI: Put pci_dev in device tree as early as possible >>>> >>>> It turns out we need to call acpi_pci_irq_add_prt() after the pci bridges >>>> are scanned. >>>> >>>> Bjorn said: >>>> The bus number binding means acpi_pci_irq_add_prt() has to happen >>>> after enumerating everything below a bridge, and it will prevent us >>>> from doing any bus number reassignment for hotplug. >>>> >>>> I think we should remove the bus numbers from the cached _PRT (or >>>> maybe even remove the _PRT caching completely). When we enable a PCI >>>> device's IRQ, we should search up the PCI device tree looking for a >>>> _PRT associated with each node, and applying normal PCI bridge >>>> swizzling when we don't find a _PRT. I think this can be done without >>>> using PCI bus numbers at all. >>>> >>>> So here we try to remove _PRT caching completely. >>>> >>>> -v2: check !handle early. >>>> >>>> Reported-and-tested-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx> >>>> Suggested-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> >>>> Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx> >>> >>> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> >>> >>>> --- >>>> drivers/acpi/pci_irq.c | 95 +++++++++++++++++--------------------------- >>>> drivers/acpi/pci_root.c | 18 -------- >>>> drivers/pci/pci-acpi.c | 24 ----------- >>>> include/acpi/acpi_drivers.h | 5 -- >>>> 4 files changed, 38 insertions(+), 104 deletions(-) >> >> Bjorn, >> >> Can you put this one into pci/next? > > I'm not sure what this patch is based on or what the best way to merge > it is. It doesn't apply cleanly to my next or > pci/yinghai-root-bus-hotplug branches. My fault, that is based on pci/next + pm/linux-next linux-next removed acpi_power_resource_(un)register_device ... > > I did apply it manually on top of pci/yinghai-root-bus-hotplug to try > it out, but we need to tweak the messages a little bit. > > Previously we printed "ACPI: PCI Interrupt Routing Table [%s._PRT]" > once when loading it, which was fine. Now we print it every time we > look at a _PRT, which is too much because it isn't really adding any > information. > > We also print "ACPI Exception: AE_NOT_FOUND, Evaluating _PRT > [AE_NOT_FOUND] (20121018/pci_irq-259)" if we find ACPI nodes without > _PRTs, which we shouldn't do, because that's a common and normal > situation. Sure. Can you have separated patch to do that ? Or want me to resend the patch. Thanks Yinghai -- 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
