Re: [PATCH] Driver Core patches for 2.6.10-rc1

From: Greg KH
Date: Tue Nov 09 2004 - 20:41:54 EST

On Sun, Nov 07, 2004 at 03:28:05PM +0000, Russell King wrote:
> On Tue, Nov 02, 2004 at 10:32:29PM +0000, Russell King wrote:
> > On Mon, Nov 01, 2004 at 01:57:57PM -0800, Greg KH wrote:
> > > This patch fixes the problem by using a separate semaphore, called
> > > dpm_list_sem, to cover the places where we need the device pm lists to be
> > > stable, and by being careful about how we traverse the lists on suspend and
> > > resume. I have analysed the various cases that can occur and I am
> > > confident that I have handled them all correctly. I posted this patch
> > > together with a detailed analysis 10 days ago.
> >
> > Does this mean that a device driver can have its suspend or resume
> > methods called in the middle of a probe or remove on a different CPU ?
> > (note: x86 APM does not freeze all processes last time I checked...)
> >
> > If yes, has anyone audited the drivers to ensure that they're correct
> > in respect of this?
> I'll repost the above question since it's of fundamental importance.

Paul sent in this change, so I'll let him address this.


greg k-h
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