linux-kernel - Re: [PATCH] drivers-core: nullify private pointer on device-release

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Message-ID: <20091005160350.GA13522@kroah.com>
Date:	Mon, 5 Oct 2009 09:03:50 -0700
From:	Greg KH <greg@...ah.com>
To:	Guennadi Liakhovetski <g.liakhovetski@....de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers-core: nullify private pointer on device-release

On Mon, Oct 05, 2009 at 10:11:50AM +0200, Guennadi Liakhovetski wrote:
> On Thu, 1 Oct 2009, Greg KH wrote:
> 
> > On Thu, Oct 01, 2009 at 03:45:56PM +0200, Guennadi Liakhovetski wrote:
> > > On Thu, 1 Oct 2009, Greg KH wrote:
> > > 
> > > > On Thu, Oct 01, 2009 at 10:02:08AM +0200, Guennadi Liakhovetski wrote:
> > > > > Device structures can be reused over multiple device_add / device_release 
> > > > > cycles.
> > > > 
> > > > They shouldn't be as they should be dynamic, not static.
> > > 
> > > Should they? I'm pretty sure this is not the first time this comes up - 
> > > there are several drivers and / or subsystems, that re-use driver objects. 
> > 
> > Then those drivers and subsystems should be fixed, as that is incorrect.
> > 
> > > But finding in mail archives wouldn't be very easy. And it worked until 
> > > now - why should we break it?
> > 
> > I would argue that this code was always broken.
> > When did this problem show up for you?
> 
> Since commit b4028437876866aba4747a655ede00f892089e14

Again, which driver/devices are having this problem?  The patch
referenced above had been in linux-next for almost 6 months with no
reported problems, so this is news to me :)

thanks,

greg k-h
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