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ACPI - fixed initialization of pci briges irqtable

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- if no IRQ table is found, we report that ACPI cannot map IRQ
  correctly

- fixes mapping of IRQs in KVM because in this case we just fall
  through and use the IRQ configured by BIOS. PCI still reports
  that it failed to use ACPI. It is a hint if things go wrong.
This commit is contained in:
Tomas Hruby 2011-12-20 08:03:43 +00:00
parent b73089ce3e
commit 71533c8a83
1 changed files with 10 additions and 2 deletions
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12
drivers/acpi/pci.c
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@ -199,8 +199,6 @@ PRIVATE ACPI_STATUS get_pci_irq_routing(struct pci_bridge * bridge)
for (i = 0; i < PCI_MAX_DEVICES; i++) for (i = 0; i < PCI_MAX_DEVICES; i++)
bridge->children[i] = NULL; bridge->children[i] = NULL;
for (i = 0; i < IRQ_TABLE_ENTRIES; i++)
bridge->irqtable[i] = -1;
for (tbl = (ACPI_PCI_ROUTING_TABLE *)abuff.Pointer; tbl->Length; for (tbl = (ACPI_PCI_ROUTING_TABLE *)abuff.Pointer; tbl->Length;
tbl = (ACPI_PCI_ROUTING_TABLE *) tbl = (ACPI_PCI_ROUTING_TABLE *)
@ -232,6 +230,14 @@ PRIVATE ACPI_STATUS get_pci_irq_routing(struct pci_bridge * bridge)
return AE_OK; return AE_OK;
} }
PRIVATE void bridge_init_irqtable(struct pci_bridge * bridge)
{
int i;
for (i = 0; i < IRQ_TABLE_ENTRIES; i++)
bridge->irqtable[i] = -1;
}
PRIVATE ACPI_STATUS add_pci_dev(ACPI_HANDLE handle, PRIVATE ACPI_STATUS add_pci_dev(ACPI_HANDLE handle,
UINT32 level, UINT32 level,
void *context, void *context,
@ -264,6 +270,7 @@ PRIVATE ACPI_STATUS add_pci_dev(ACPI_HANDLE handle,
return AE_NO_MEMORY; return AE_NO_MEMORY;
bridge->handle = handle; bridge->handle = handle;
bridge->parent = parent_bridge; bridge->parent = parent_bridge;
bridge_init_irqtable(bridge);
status = get_pci_irq_routing(bridge); status = get_pci_irq_routing(bridge);
if (!(ACPI_SUCCESS(status))) { if (!(ACPI_SUCCESS(status))) {
@ -293,6 +300,7 @@ PRIVATE ACPI_STATUS add_pci_root_dev(ACPI_HANDLE handle,
pci_root_bridge.primary_bus = -1; /* undefined */ pci_root_bridge.primary_bus = -1; /* undefined */
pci_root_bridge.secondary_bus = 0; /* root bus is 0 in a single root pci_root_bridge.secondary_bus = 0; /* root bus is 0 in a single root
system */ system */
bridge_init_irqtable(&pci_root_bridge);
status = get_pci_irq_routing(&pci_root_bridge); status = get_pci_irq_routing(&pci_root_bridge);
if (!ACPI_SUCCESS(status)) if (!ACPI_SUCCESS(status))