lkml.org 
[lkml]   [2005]   [Apr]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] PCI: Add pci shutdown ability
Hi!

> > > Well it seems that people are starting to want to hook the reboot
> > > notifier, or the device shutdown facility in order to properly shutdown
> > > pci drivers to make kexec work nicer.
> > >
> > > So here's a patch for the PCI core that allows pci drivers to now just
> > > add a "shutdown" notifier function that will be called when the system
> > > is being shutdown. It happens just after the reboot notifier happens,
> > > and it should happen in the proper device tree order, so everyone should
> > > be happy.
> > >
> > > Any objections to this patch?
> >
> > Yes.
> >
> > I believe it should just do suspend(PMSG_SUSPEND) before system
> > shutdown. If you think distintion between shutdown and suspend is
> > important (I am not 100% convinced it is), we can just add flag
> > saying "this is system shutdown".
>
> So if I understand this correctly, you'd like to manually turn off devices
> during a power off. I believe the ACPI spec recommends this for S4 (but also
> to leave on wake devices), but not necessarily S5. Still it may be a good
> idea. Comments?

It is neccessary for some machines (interrupt controller) or machine
will not power down...

> > Actually this patch should be in the queue somewhere... We had it in
> > suse trees for a long time, and IMO it can solve problem easily.
>
> Yeah, that's what I had in mind when I mentioned PMSG_FREEZE. It seems
> to replace "shutdown" in many ways, is this correct?

Yes. (Actually I'm not sure if PMSG_FREEZE or PMSG_SUSPEND is right
thing to do for suspend.)
Pavel
--
Boycott Kodak -- for their patent abuse against Java.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-04-25 23:20    [W:0.200 / U:1.404 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site