acpi resume related patch

[Pawel Jakub Dawidek]

On Sat, Jan 26, 2013 at 04:18:57PM +0200, Andriy Gapon wrote:
> on 25/01/2013 18:08 Andriy Gapon said the following:
> > on 25/01/2013 15:51 John Baldwin said the following:
> >> On Friday, January 25, 2013 3:43:33 am Andriy Gapon wrote:
> >>>
> >>> If you have ACPI suspend/resume working, if it used to work but stopped working
> >>> at some time, if it never worked, but you are still hoping, could you please
> >>> test the following patch and report back?
> >>>
> >>> http://svn.freebsd.by/files/acpi-apic-wakeup-final.patch
> >>
> >> This will break systems not using the local APIC since you unconditionally
> >> call lapic_setup() on resume.This was part of the feature of the previous
> >> code that by using a dummy pic it could register it only when the local APIC
> >> was used.
> > 
> > Thank you for drawing my attention to this.  I will try to fix this issue.
> > The reason I want to remove lapic from 'pics' (and I already described it in a
> > private email) is that Local APIC is a special kind of PIC.  It's already
> > explicitly initialized by APs.  Putting it into 'pics' tailq just obfuscates the code.
> > 
> >> It should also be registered before any of the I/O APICs are by
> >> the design of the local_apic.c code.
> > 
> > In fact, as I see in the code, Local APIC is always registered _after_ I/O APICs.
> > And thus lapic_resume was called after ioapic_resume.
> > Additionally, currently there is no synchronization between initialization of
> > Local APICs on APs and initialization of I/O APICs at the wakeup/resume time.
> > 
> 
> Here is an updated version of the patch:
> http://people.freebsd.org/~avg/acpi-apic-wakeup.2.patch

FYI, it doesn't change anything for me. Resume seems to work, but
suspend just reset my laptop.

I unload all driver modules (including if_em, sound, nvidia, usb).
The only driver I keep is ahci.

-- 
Pawel Jakub Dawidek                       http://www.wheelsystems.com
FreeBSD committer                         http://www.FreeBSD.org
Am I Evil? Yes, I Am!                     http://tupytaj.pl
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