Re: 2.6.22-rc1 regression: tifm prevents suspending [was: Re: [2.6.22-rc1-mm1] vaio laptop (SZ72B) immediately resumes after STR]

[Rafael J. Wysocki]

On Saturday, 19 May 2007 19:17, Michal Piotrowski wrote:
> Hi,
> 
> On 19/05/07, Mattia Dongili <malattia@xxxxxxxx> wrote:
> > On Sat, May 19, 2007 at 12:04:13AM -0700, Andrew Morton wrote:
> > > On Sat, 19 May 2007 15:48:29 +0900 Mattia Dongili <malattia@xxxxxxxx> wrote:
> > >
> > > > On Fri, May 18, 2007 at 12:22:40AM -0700, Andrew Morton wrote:
> > > > > On Fri, 18 May 2007 16:15:24 +0900 Mattia Dongili <malattia@xxxxxxxx> wrote:
> > > > >
> > > > > > Hello,
> > > > > >
> > > > > > After finally catching fw-{ohci,core} to be problematic during resume,
> > > > > > I'm now experiencing an immediate resume after suspending.
> > > > > >
> > > > > > 2.6.21-rc7-mm* didn't even suspend, my last known suspend-and-resuming
> > > > > > kernel was 2.6.21-rc5-mm3 (I know one other vaio SZ user could STR with
> > > > > > 2.6.21-rc6-mm* after the cpuidle fixes).
> > > > > >
> > > > > > my .config is: http://oioio.altervista.org/linux/config-2.6.22-rc1-mm1-1
> > > > > > and a str cycle with PM_DEBUG=y:
> > > > > > http://oioio.altervista.org/linux/dmesg-SRT-immediately-resumes.txt
> > > > ...
> > > > > > Any idea where to start from? (bisecting is ok, but it'll take some
> > > > > > time...)
> > > > >
> > > > > Bisecting isn't that bad ;) I'd pick git-acpi.patch as the starting point.
> > > >
> > > > ok, git-acpi.patch is not the bad boy :)
> > > > Anyway what we have is a regression in 2.6.22-rc1 since the laptop can't
> > > > suspend (it sits on the "Stopping tasks" console screen) while 2.6.21
> > > > can.
> > > > I'm now bisecting this, will come to -mm1 later when done with this one.
> > >
> > > OK, thanks.
> > >
> > > > Who is the regression-guy?
> > >
> > > Len, usually ;)    But I think you meant Michal, cc'ed here.
> >
> > LOL, not this time. We have the responsible commit for 2.6.22-rc1 (Cc
> > added):
> >
> > 3540af8ffddcdbc7573451ac0b5cd57a2eaf8af5 is first bad commit
> > commit 3540af8ffddcdbc7573451ac0b5cd57a2eaf8af5
> > Author: Alex Dubov <oakad@xxxxxxxxx>
> > Date:   Thu Apr 12 16:59:15 2007 +1000
> >
> 
> Subject    : Broken suspend on SMP with tifm
> References : http://lkml.org/lkml/2007/5/13/161
> Submitter  : Rafael J. Wysocki <rjw@xxxxxxx>
> Status     : patch was suggested
> 
> Actually should be "a few patches was suggested"
> 
> Rafael, please point me the right patch.

Fixed in the mainline, by

commit e3dfd2964ea86ae65f511b10d62ea54d46db3708
make freezeable workqueues singlethread

Greetings,
Rafael
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