Re: [V2 2/6] driver core: auxiliary bus: Add driver data helpers

Andy Shevchenko
2021-12-08T10:16:53Z

On Wed, Dec 08, 2021 at 09:47:56AM +0100, Greg KH wrote:
> On Wed, Dec 08, 2021 at 08:43:53AM +0000, Lee Jones wrote:
> > On Wed, 08 Dec 2021, Greg KH wrote:
> >
> > > On Wed, Dec 08, 2021 at 09:03:16AM +0200, Leon Romanovsky wrote:
> > > > On Tue, Dec 07, 2021 at 09:14:44AM -0800, David E. Box wrote:
> > > > > Adds get/set driver data helpers for auxiliary devices.
> > > > >
> > > > > Signed-off-by: David E. Box <david.e.box@linux.intel.com>
> > > > > Reviewed-by: Mark Gross <markgross@kernel.org>
> > > > > ---
> > > > > V2
> > > > > - No changes
> > > > >
> > > > > include/linux/auxiliary_bus.h | 10 ++++++++++
> > > > > 1 file changed, 10 insertions(+)
> > > >
> > > > I would really like to see an explanation why such obfuscation is really
> > > > needed. dev_*_drvdata() is a standard way to access driver data.
> >
> > I wouldn't call it obfuscation, but it does looks like abstraction for
> > the sake of abstraction, which I usually push back on. What are the
> > technical benefits over using the dev_*() variant?
>
> See my response at:
> https://lore.kernel.org/r/YbBwOb6JvWkT3JWI@kroah.com
> for why it is a good thing to do.
>
> In short, driver authors should not have to worry about mixing
> bus-specific and low-level driver core functions.

Right! I just answered to Leon with the similar view behind (using
different words).

--
With Best Regards,
Andy Shevchenko