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SubjectRe: WARNING: at kernel/resource.c:189 __release_resource
Date
On Friday 30 November 2007 03:49:55 pm Jiri Slaby wrote:
> On 11/30/2007 10:08 PM, Bjorn Helgaas wrote:
> > On Thursday 29 November 2007 05:42:07 pm Andrew Morton wrote:
> >> On Thu, 29 Nov 2007 16:40:37 -0700
> >>> Maybe we could either remove the pnp_{stop,start}_dev() calls
> >>> from the suspend/resume path, or move the PNP resource management
> >>> out of pnp_{start,stop}_dev().
> >>>
> >>> Bjorn
> >>>
> >>> [1] http://lkml.org/lkml/2005/11/30/39
> >> So was this particular problem caused/exposed by
> >> pnp-request-ioport-and-iomem-resources-used-by-active-devices.patch, or is
> >> it in mainline?
> >
> > I'm pretty sure this problem is caused by that patch, so we
> > we shouldn't see this in mainline.
> >
> > Jiri, can you try the additional patch below, please?
> >
> > Index: linux-mm/drivers/pnp/driver.c
> > ===================================================================
> > --- linux-mm.orig/drivers/pnp/driver.c 2007-11-30 13:58:25.000000000 -0700
> > +++ linux-mm/drivers/pnp/driver.c 2007-11-30 13:59:37.000000000 -0700
> > @@ -161,13 +161,6 @@
> > return error;
> > }
> >
> > - if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE) &&
> > - pnp_can_disable(pnp_dev)) {
> > - error = pnp_stop_dev(pnp_dev);
> > - if (error)
> > - return error;
> > - }
> > -
> > if (pnp_dev->protocol && pnp_dev->protocol->suspend)
> > pnp_dev->protocol->suspend(pnp_dev, state);
> > return 0;
> > @@ -185,12 +178,6 @@
> > if (pnp_dev->protocol && pnp_dev->protocol->resume)
> > pnp_dev->protocol->resume(pnp_dev);
> >
> > - if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)) {
> > - error = pnp_start_dev(pnp_dev);
> > - if (error)
> > - return error;
> > - }
> > -
> > if (pnp_drv->resume)
> > return pnp_drv->resume(pnp_dev);
> >
>
> No, it breaks suspend.

Thanks for trying it. What are the symptoms? I'd like to understand
why we need to stop the devices before suspend.

Bjorn
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