Re: [PATCH v2] iio: core: register chardev only if needed

[Andy Shevchenko]

On Wed, Dec 9, 2020 at 5:45 PM Alexandru Ardelean
<ardeleanalex@xxxxxxxxx> wrote:
> On Wed, Dec 9, 2020 at 5:37 PM Andy Shevchenko
> <andy.shevchenko@xxxxxxxxx> wrote:
> > On Thu, Dec 3, 2020 at 11:55 AM Alexandru Ardelean
> > <alexandru.ardelean@xxxxxxxxxx> wrote:

...

> > Are you sure there is no user space application that doesn't rely on
> > character device to be always present?
>
> Nope.
> I'm not sure.
> I'm also not completely sure how Jonathan feels about this patch being
> added now [so late].
>
> Though, technically if the chardev was already there, without all the
> control in place [to enable IIO buffers and other stuff through the
> chardev] then it's technically just a "marker" file.
> Which arguably is a lot to have (i.e. chardev that should be unusable).
>
> If it is usable with no control in place for buffers or other stuff
> (i.e. I missed something), then I also don't know.
>
> So, this patch on it's own can still be interpreted as an RFC.
> See:
> https://lore.kernel.org/linux-iio/20201121180246.772ad299@archlinux/

Don't take me wrong, I'm not against a good change (I doesn't like
dangling files), but it might break some use cases.

-- 
With Best Regards,
Andy Shevchenko