linux/drivers/pci
Yinghai Lu 181380b702 PCI/ACPI: Don't cache _PRT, and don't associate them with bus numbers
Previously, we cached _PRT (PCI routing table, ACPI 5.0 sec 6.2.12)
contents and associated each _PRT entry with a PCI bus number.  The bus
number association means dependencies on PCI device enumeration and bus
number assignment, as well as on the PCI/ACPI binding process.

After 4f535093cf ("PCI: Put pci_dev in device tree as early as possible"),
these dependencies caused the IRQ issues reported by Peter:

    pci 0000:00:1e.0: PCI bridge to [bus 09] (subtractive decode)
    pci 0000:00:1e.0: can't derive routing for PCI INT A
    snd_ctxfi 0000:09:02.0: PCI INT A: no GSI - using ISA IRQ 5
    irq 18: nobody cared (try booting with the "irqpoll" option)

This patch removes _PRT caching.  Instead, we evaluate _PRT as needed
in the pci_enable_device() path.  This also removes the dependency on
PCI bus numbers: we can simply look at the _PRT associated with each
bridge as we walk upstream toward the root.

[bhelgaas: changelog]
Reference: https://bugzilla.kernel.org/show_bug.cgi?id=53561
Reported-and-tested-by: Peter Hurley <peter@hurleysoftware.com>
Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2013-02-16 11:58:34 -07:00
..
hotplug PCI: acpiphp: Remove dead code for PCI host bridge hotplug 2013-02-02 14:28:02 -07:00
pcie PCI/PM: Do not suspend port if any subordinate device needs PME polling 2012-12-26 10:39:23 -07:00
access.c PCI: Add accessors for PCI Express Capability 2012-08-23 09:41:20 -06:00
ats.c Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci 2012-01-11 18:50:26 -08:00
bus.c PCI: Put pci_dev in device tree as early as possible 2013-01-25 16:22:37 -07:00
host-bridge.c PCI: add host bridge release support 2012-04-30 14:52:43 -06:00
hotplug-pci.c PCI: hotplug: remove pci_do_scan_bus() 2012-06-13 15:42:27 -06:00
htirq.c pci: Fix files needing export.h for EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:31:22 -04:00
ioapic.c PCI changes for the v3.8 merge window: 2012-12-13 12:14:47 -08:00
iov.c PCI: Remove unused "rc" in virtfn_add_bus() 2013-02-01 16:00:16 -07:00
irq.c PCI: Convert dev_printk(KERN_<LEVEL> to dev_<level>( 2012-11-07 15:24:18 -07:00
Kconfig PCI: Drop bogus default from ARCH_SUPPORTS_MSI 2012-09-10 16:49:52 -06:00
Makefile PCI: Always build setup-bus when PCI is enabled 2012-11-28 13:00:58 -08:00
msi.c s390/pci: PCI adapter interrupts for MSI/MSI-X 2012-11-30 17:47:21 +01:00
msi.h PCI: MSI: Move MSI-X entry definition to pci_regs.h 2010-12-23 12:53:07 -08:00
of.c PCI: OF: Don't crash when bridge parent is NULL. 2011-08-19 08:51:37 -07:00
pci-acpi.c PCI/ACPI: Don't cache _PRT, and don't associate them with bus numbers 2013-02-16 11:58:34 -07:00
pci-driver.c PCI: Skip attaching driver in device_add() 2013-01-25 15:10:12 -07:00
pci-label.c switch ->is_visible() to returning umode_t 2012-01-03 22:54:55 -05:00
pci-stub.c PCI: Convert dev_printk(KERN_<LEVEL> to dev_<level>( 2012-11-07 15:24:18 -07:00
pci-sysfs.c PCI: Remove spurious error for sriov_numvfs store and simplify flow 2012-12-26 10:39:22 -07:00
pci.c ACPI / PCI: Rework the setup and cleanup of device wakeup 2013-01-03 13:09:41 +01:00
pci.h PCI: Put pci_dev in device tree as early as possible 2013-01-25 16:22:37 -07:00
probe.c PCI: Put pci_dev in device tree as early as possible 2013-01-25 16:22:37 -07:00
proc.c PCI/PM: Fix proc config reg access for D3cold and bridge suspending 2012-11-05 10:46:23 -07:00
quirks.c PCI: Reduce Ricoh 0xe822 SD card reader base clock frequency to 50MHz 2012-12-26 10:43:06 -07:00
remove.c PCI: Make device create/destroy logic symmetric 2013-01-25 14:42:06 -07:00
rom.c PCI: Use phys_addr_t for physical ROM address 2012-12-10 11:24:42 -07:00
search.c PCI: Fix reference count leak in pci_dev_present() 2013-01-25 13:49:27 -07:00
setup-bus.c PCI: Add root bus children dev's res to fail list 2013-01-25 13:45:00 -07:00
setup-irq.c PCI: Provide a default pcibios_update_irq() 2012-09-18 17:28:21 -06:00
setup-res.c Merge branch 'pci/nikhil-big-bar-fixes' into next 2012-07-18 14:06:20 -06:00
slot.c pci: add module.h to files implicitly relying on its presence. 2011-10-31 19:31:23 -04:00
syscall.c headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
vpd.c pci: Fix files needing export.h for EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:31:22 -04:00
xen-pcifront.c PCI changes for the v3.8 merge window: 2012-12-13 12:14:47 -08:00