Re: [BUG] MIPS: Hibernation in the latest linux-mips:master branch not work

Wu Zhangjin
2009-07-01T07:16:46Z

On Tue, 2009-06-30 at 15:45 +0100, Ralf Baechle wrote:
> On Tue, Jun 30, 2009 at 10:41:08PM +0800, Wu Zhangjin wrote:
>
> > I just updated my git repository to the master branch of the latest
> > linux-mips git repository, and tested the STD/Hibernation support on
> > fuloong2e and yeeloong2f, it failed:
> >
> > when using the no_console_suspend kernel command line to debug, it
> > stopped on:
> >
> > PM: Shringking memory... done (1000 pages freed)
> > PM: Freed 160000 kbytes in 1.68 seconds (95.23 MB/s)
> > PM: Creating hibernation image:
> > PM: Need to copy 5053 pages
> > PM: Hibernation image created (4195 pages copied)
> >
> > and then, the number indicator light of keyboard works well, but can not
> > type anything.
> >
> > anybody have tested it on another platform? does it work?
>
> At the time of the merge I tested it on Malta and found it to be working.
>

Just traced it, the executing path is something like this:

hibernate(kernel/power/hibernate.c)
--> hibernation_snapshot
--> dpm_resume_end
--> dpm_resume
--> device_resume
--> dev->bus->resume(generic_ide_resume), dev_name(dev) = 0.0
--> blk_execute_rq
{
DECLARE_COMPLETION_ONSTACK(wait);
...
wait_for_completion(&wait); // stop here
...
}

I guess there is a possible bug in the latest ide patches, I'm trying to
find which one is 'bad'.

the ide driver i used is VIA82CXXX chipset support.

Regards,
Wu Zhangjin