Re: ACPI scan regression -> Boot fail on Cherrytrail w/ 5.11-rc3

[Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>]

>>> In addition to what Hans asked for, can you please build the kernel with the
>>> debug patch below applied (instead of the Hans' debug patch), try to boot
>>> the affected machine with it and see what is missing with respect to booting
>>> the kernel with the two problematic commits reverted?
>>
>> Sorry, not following. Are you asking me to apply the patch below as well
>> as revert the two problematic commits? Or just the patch below?
> 
> Just the patch below.
> 
>> the boot process is stuck without the reverts and I don't have a serial link to
>> see what happens (closed form-factor).
> 
> The point is that the patch below may unstuck it, in which case it
> should be possible to find out what is missing with respect to the
> full successful boot.

No luck. I tried twice with the patch below only, and the device is 
still stuck after the 'Loading initial ramdisk ...'.

>>> Also please send me the outout of "dmesg | grep "Enumeration" from the debug
>>> kernel if possible. >
>>> ---
>>>    drivers/acpi/scan.c |    2 +-
>>>    1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> Index: linux-pm/drivers/acpi/scan.c
>>> ===================================================================
>>> --- linux-pm.orig/drivers/acpi/scan.c
>>> +++ linux-pm/drivers/acpi/scan.c
>>> @@ -1951,7 +1951,7 @@ static acpi_status acpi_bus_check_add(ac
>>>                u32 count = acpi_scan_check_dep(handle);
>>>                /* Bail out if the number of recorded dependencies is not 0. */
>>>                if (count > 0) {
>>> -                     acpi_bus_scan_second_pass = true;
>>> +                     acpi_handle_info(handle, "Enumeration skipped\n");
>>>                        return AE_CTRL_DEPTH;
>>>                }
>>>        }
>>>
>>>
>>>