Re: [PATCH 2/2] ath9k: disable RNG by default

[Jason Cooper <jason-NLaQJdtUoK4Be96aLqz0jA@public.gmane.org>]

Hi Miaoqing Pan, Stephen,

*gentle reminder: others are reading which may not be directly included
in the conversation.  Including the archives.  Please avoid top posting.
:)

On Wed, Aug 10, 2016 at 07:43:45AM +0000, Pan, Miaoqing wrote:
> The problem with using the add_device_randomness is that we do not
> know when to call that API, and we have to make our solution either
> timer-based or interrupt based, which is not really the correct way of
> implementing this feature.

Exactly.  I think we're dancing around the problem by discussing the
quality of what the ath9k adc provides.

The fact is, barring userspace expectations of /dev/hwrng, hw_random is
the appropriate place for it.  It's not a devicetree blob, mac address,
or pci config space.  Which are things we feed in once for the heck of
it.  This is a *continuous* source or questionable quality.

I'm seriously considering putting this and timeriomem-rng into a
subdirectory under hw_random/, maybe environ/.  Anything in there gets
quality=0 for default, and *doesn't* contribute to /dev/hwrng.

Regardless which path we take, I think we should include 'adc' in the
name.  I've heard countless times about "Atheros cards come with an rng
on board". :-/

thx,

Jason.
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