linux-kernel - Re: [RFC PATCH] crypto: make the seed() function optional

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Date:   Sat, 7 Oct 2017 11:33:18 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Mathieu Malaterre <malat@...ian.org>
Cc:     prasannatsmkumar@...il.com, malat@...ian.org,
        nhorman@...driver.com, davem@...emloft.net,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] crypto: make the seed() function optional

Mathieu Malaterre <malat@...ian.org> wrote:
> This makes it simplier for driver author to not provide the seed() function
> in case of a pseudo RNG where the seed operation is a no-op.
> 
> Document that the seed() function pointer is optional in header.
> 
> Signed-off-by: Mathieu Malaterre <malat@...ian.org>
> ---
> The PRNG as found on Ingenic JZ4780 is one such example. This is found on a
> MIPS Creator CI20 SoC.

So how does it seed itself? This also contradicts with the JZ4780
driver that's currently in the patch queue as it does contain a
seed function.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt