dsdt: track device hierarchy

Add parent entry to acpi_device struct, set it when parsing sub-devices,
restore it when done.

This allows to track and check for device relationships, for example the
GSIn sub-devices of PCI0.  Known limitation: Establishing relationship
using Scope() does not work.

This also makes the parser process data after sub-devices correctly,
for example find _CRS in this case:

        Device (PCI0)
        {
	    [ ... ]
            Device (GSI0)
	    [ ... ]
            Name (_CRS, ResourceTemplate ()
	    { ... ]
	}

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>.

0 files changed, 0 insertions, 0 deletions