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authorYinghai Lu <yinghai@kernel.org>2013-02-16 11:58:34 -0700
committerBjorn Helgaas <bhelgaas@google.com>2013-02-16 11:58:34 -0700
commit181380b702eee1a9aca51354d7b87c7b08541fcf (patch)
treec95dc8c7649fe97c18a99d3ee69ad014adf8cfaa /include/acpi
parentbe6d2867b4f68a575c78fa368abd3ad49980c514 (diff)
downloadlinux-181380b702eee1a9aca51354d7b87c7b08541fcf.tar.bz2
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.h5
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;