On Tue, Aug 18, 2026 at 05:37:52PM -0700, Nathan Chancellor wrote:
> On Fri, Aug 07, 2026 at 12:22:37PM +0200, Rafael J. Wysocki wrote:
> >
> > If acpi_dev_get_resources() returns overlapping I/O or memory resources,
> > the subsequent registration of a platform device will fail with -EBUSY
> > due to a resource conflict. This is reported to happen on Acer Aspire
> > ES1-572 [1].
> >
> > Avoid that by adjusting resources returned by acpi_dev_get_resources()
> > to eliminate partial overlaps between them.
> >
> > This has not been regarded as necessary before because putting
> > overlapping resources into the _CRS of one device is really pointless,
> > but now that the issue has been reported to actually happen in the
> > field, it needs to be done.
> >
> > Fixes: ab06eb920401 ("ACPI: scan: Register platform devices for fixed event
> > buttons")
> > Reported-by: Julien <[email protected]>
> > Closes:
> > https://lore.kernel.org/linux-integrity/cajogg3z6ljpdsdpnbxajgy8_wqxfhybrxe4eiurzf3kpu5a...@mail.gmail.com/
> > [1]
>
> I bisected the following kernel message that I see on one of my aarch64
> test machines to this change in -next as commit f234fdaae1ca ("ACPI:
> scan: Avoid registering platform devices with resource overlaps"):
>
> arm-cmn ARMHC600:00: probe with driver arm-cmn failed with error -22
>
> Is this expected? If not, what information would be helpful for debugging
> this?
Looks like a mess in _CRS. You can share dsdt.dsl to see if the resource
conflict is visible from there.
Does anything stop working?
--
With Best Regards,
Andy Shevchenko
