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[ACPI]

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- Create a resource list for the PCI root bus (even though it doesn't use any resources according to ACPI) and fill it with a bus number resource descriptor
- Fixes PCI device detection with ACPI enabled

svn path=/trunk/; revision=47729
This commit is contained in:
Cameron Gutman 2010-06-09 23:02:34 +00:00
parent 2d489373f9
commit 8be9465a83
1 changed files with 31 additions and 0 deletions
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31
reactos/drivers/bus/acpi/buspdo.c
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@ -644,6 +644,37 @@ Bus_PDO_QueryResources(
ACPI_RESOURCE* resource;
ULONG ResourceListSize;
ULONG i;
ULONGLONG BusNumber;
/* A bus number resource is not included in the list of current resources
* for the root PCI bus so we manually query one here and if we find it
* we create a resource list and add a bus number descriptor to it */
AcpiStatus = acpi_evaluate_integer(DeviceData->AcpiHandle, "_BBN", NULL, &BusNumber);
if (AcpiStatus == AE_OK)
{
DPRINT1("Found PCI root hub: %d\n", BusNumber);
ResourceListSize = sizeof(CM_RESOURCE_LIST);
ResourceList = (PCM_RESOURCE_LIST)ExAllocatePool(PagedPool, ResourceListSize);
if (!ResourceList)
return STATUS_INSUFFICIENT_RESOURCES;
ResourceList->Count = 1;
ResourceList->List[0].InterfaceType = Internal;
ResourceList->List[0].BusNumber = 0;
ResourceList->List[0].PartialResourceList.Version = 1;
ResourceList->List[0].PartialResourceList.Revision = 1;
ResourceList->List[0].PartialResourceList.Count = 1;
ResourceDescriptor = ResourceList->List[0].PartialResourceList.PartialDescriptors;
ResourceDescriptor->Type = CmResourceTypeBusNumber;
ResourceDescriptor->ShareDisposition = CmResourceShareDeviceExclusive;
ResourceDescriptor->u.BusNumber.Start = BusNumber;
ResourceDescriptor->u.BusNumber.Length = 1;
Irp->IoStatus.Information = (ULONG_PTR)ResourceList;
return STATUS_SUCCESS;
}
/* Get current resources */
Buffer.Length = 0;