On 08.09.22 12:45:16, Dan Williams wrote: > Rafael J. Wysocki wrote: > > On Thu, Sep 8, 2022 at 8:05 AM Dan Williams <dan.j.williams@xxxxxxxxx> wrote: > > > > > > Robert Richter wrote: > > > > A lookup of a host bridge's corresponding acpi device (struct > > > > acpi_device) is not possible, for example: > > > > > > > > adev = ACPI_COMPANION(&host_bridge->dev); > > > > > > > > This could be useful to find a host bridge's fwnode handle and to > > > > determine and call additional host bridge ACPI parameters and methods > > > > such as HID/CID or _UID. > > > > > > When is this explicitly needed. "Could be useful" is interesting, but it > > > needs to have a practical need. > > > > It is needed and it is present on x86 AFAICS (see my last reply in this thread). > > > > This seems to be addressing an ARM64-specific issue. > > > > Ah, ok, thanks for pointing that out. No, it is x86. And true, it is set. So this series is actually working without this patch. It can be dropped. Now, I just checked my logs. The reason I was adding this is that during code development I modified the code to have bridge->dev.parent set. Then, the fwnode is not linked. I later dropped that change but kept this patch. Thanks for catching this. -Robert
