Re: [PATCH] hwrng: Add TX4939 RNG driver

Atsushi Nemoto
2009-05-31T17:18:19Z

On Sun, 31 May 2009 12:00:09 -0500, Matt Mackall <mpm@selenic.com> wrote:
> > >From the datasheet:
> >
> > The quality of the random numbers generated immediately after
> > reset can be insufficient. Therefore, do not use random
> > numbers obtained from the first and second generations; use
> > the ones from the third or subsequent generation.
>
> Does the datasheet say anything about -how- the random numbers are
> produced? Most physical sources that I'm aware of don't have this sort
> of issue. But some pseudo-RNGs do. So this looks a little worrisome.

Nothing for "how". If a RNG was actually a pseudo-RNG, does anything
a driver should do? Any future plan to select one RNG from multiple
sources based on randomness grade?

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Atsushi Nemoto