arm/acpi: simplify the description of PCI _CRS

The original code defines a named object for the resource template but
then returns the resource template object itself; the resulted output
is like below:

Method (_CRS, 0, NotSerialized)  // _CRS: Current Resource Settings
{
    Name (RBUF, ResourceTemplate ()
    {
        WordBusNumber (ResourceProducer, MinFixed, MaxFixed, PosDecode,
            0x0000,             // Granularity
            0x0000,             // Range Minimum
            0x00FF,             // Range Maximum
            0x0000,             // Translation Offset
            0x0100,             // Length
            ,, )
        ......
    })
    Return (ResourceTemplate ()
    {
        WordBusNumber (ResourceProducer, MinFixed, MaxFixed, PosDecode,
            0x0000,             // Granularity
            0x0000,             // Range Minimum
            0x00FF,             // Range Maximum
            0x0000,             // Translation Offset
            0x0100,             // Length
            ,, )
        ......
    })
}

So the named object "RBUF" is actually useless. The more natural way
is to return RBUF instead, or simply drop RBUF definition.

Choose the latter one to simplify the code.

Signed-off-by: Heyi Guo <guoheyi@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20200204014325.16279-7-guoheyi@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index f3e340b..fb4b166 100644 (file)
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -236,7 +236,6 @@ static void acpi_dsdt_add_pci(Aml *scope, const MemMapEntry *memmap,
                              size_mmio_high));
     }
 
-    aml_append(method, aml_name_decl("RBUF", rbuf));
     aml_append(method, aml_return(rbuf));
     aml_append(dev, method);