Re: [PATCH v9 0/3] MR8515: setupapi: Support in-built properties for device instances in SetupDiGetDevicePropertyW.

[Connor McAdams (＠cmcadams)]

Connor McAdams (@cmcadams) commented about dlls/setupapi/devinst.c:
> - if (!prop_key)
> -
>    return ERROR_INVALID_DATA;
> - if (!prop_type || (!buf && buf_size))
> -
>    return ERROR_INVALID_USER_BUFFER;
> - if (flags)
> -
>    return ERROR_INVALID_FLAGS;
> -
> - if (IsEqualGUID( &prop_key->fmtid, &DEVPKEY_Device_DeviceDesc.fmtid ))
> - {
> -
>    DWORD reg_prop = prop_key->pid - 2, size, type;
> -
> -
>    if (prop_key->pid < 2 || reg_prop >= ARRAY_SIZE(PropertyMap) || !PropertyMap[reg_prop].devPropType)
> -
>        return get_device_reg_property( device->key, prop_key, prop_type, buf, buf_size, req_size, flags );
> -
>    ret = ERROR_SUCCESS;
> -
>    type = PropertyMap[reg_prop].devPropType;
> -
>    switch (type)

Now that we only have to handle one `DEVPROPTYPE` in a special way, this can probably just be an:
```
if (type == DEVPROP_TYPE_GUID)
{
    ...
}
else
{
    ...
}