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

[Russell King <rmk+lkml@arm.linux.org.uk>]

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.

Thanks.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 PCMCIA      - http://pcmcia.arm.linux.org.uk/
                 2.6 Serial core