Hi list,

According to the ACPICA Programmer Reference, the function
AcpiOsDerivePciId takes as arguments:

AcpiOsDerivePciId(
    ACPI_HANDLE		DeviceHandle
    ACPI_HANDLE		PciRegionHandle
    ACPI_PCI_ID		**PciId)

with:
- DeviceHandle:		a handle to the PCI device.
- PciRegionHandle:	a handle the PCI configuration space operation
                         region.


However, the only call to AcpiOsDerivePciId in the ACPICA code, in
events/evrgnini.c, is:

AcpiOsDerivePciId (PciRootNode, RegionObj->Region.Node, &PciId);

Moreover, the file include/acpiosxf.h contains:

/*
  * Interim function needed for PCI IRQ routing
  */
void
AcpiOsDerivePciId(
     ACPI_HANDLE             Rhandle,
     ACPI_HANDLE             Chandle,
     ACPI_PCI_ID             **PciId);


So it seems to me that the correct arguments for AcpiOsDerivePciId are:

AcpiOsDerivePciId(
    ACPI_HANDLE		PciRootHandle
    ACPI_HANDLE		DeviceHandle
    ACPI_PCI_ID		**PciId)

with:
- PciRootHandle:	a handle the PCI root bridge upstream of the PCI
                         device (or to the name space root node if no
                         PCI root bridge was found in the ancestors).
- DeviceHandle:		a handle to the PCI device.


Is that correct?

Thanks for your help,

Grégoire