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| author | Yinghai Lu <yinghai@kernel.org> | 2013-02-16 19:58:34 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2013-02-16 19:58:34 +0100 |
| commit | 181380b702eee1a9aca51354d7b87c7b08541fcf (patch) | |
| tree | c95dc8c7649fe97c18a99d3ee69ad014adf8cfaa /include/acpi | |
| parent | PCI: acpiphp: Remove dead code for PCI host bridge hotplug (diff) | |
| download | linux-181380b702eee1a9aca51354d7b87c7b08541fcf.tar.xz linux-181380b702eee1a9aca51354d7b87c7b08541fcf.zip | |
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>
Diffstat (limited to 'include/acpi')
| -rw-r--r-- | include/acpi/acpi_drivers.h | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/include/acpi/acpi_drivers.h b/include/acpi/acpi_drivers.h index 8b1d7a6a9695..627749af0ba7 100644 --- a/include/acpi/acpi_drivers.h +++ b/include/acpi/acpi_drivers.h @@ -90,11 +90,6 @@ int acpi_pci_link_allocate_irq(acpi_handle handle, int index, int *triggering, int *polarity, char **name); int acpi_pci_link_free_irq(acpi_handle handle); -/* ACPI PCI Interrupt Routing (pci_irq.c) */ - -int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus); -void acpi_pci_irq_del_prt(int segment, int bus); - /* ACPI PCI Device Binding (pci_bind.c) */ struct pci_bus; |