Hi Mark, Grant,

> On Mon, 14 Jan 2013 02:51:45 +0000, Mark Brown
> <broo...@opensource.wolfsonmicro.com> wrote:
> > On Thu, Nov 01, 2012 at 02:05:36PM -0400, Vivien Didelot wrote:
> > > As for i2c-core, let the SPI core handle the removal of the
> > > device's
> > > drvdata, after a remove() or a probe() failure.
> > 
> > Any driver that notices this change is buggy, the driver shouldn't
> > use a drvdata value that it didn't set.  I had thought this stuff
> > had
> > all been removed from I2C and either dropped or factored out into
> > the
> > driver core...
> 
> Looks to me like __device_release_driver() in drivers/base/dd.c
> already
> does this.
> 
> g.

You are right, I figured this out after the resend of this patch, see my reply 
here:
https://lkml.org/lkml/2012/12/4/224

    -Vivien
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