linux-kernel - Re: [PATCH v2 5/5] hwrng: amd: Rework of the amd768-hwrng driver

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Date:   Fri, 26 Aug 2016 13:29:55 +0000
From:   Jason Cooper <jason@...edaemon.net>
To:     LABBE Corentin <clabbe.montjoie@...il.com>
Cc:     mpm@...enic.com, herbert@...dor.apana.org.au,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 5/5] hwrng: amd: Rework of the amd768-hwrng driver

Hi Corentin,

On Fri, Aug 26, 2016 at 10:38:02AM +0200, LABBE Corentin wrote:
> On Thu, Aug 25, 2016 at 02:56:38PM +0000, Jason Cooper wrote:
> > On Thu, Aug 25, 2016 at 02:16:35PM +0200, LABBE Corentin wrote:
> > > This patch convert the hwrng interface used by amd768-rng to its new API
> > > by replacing data_read()/data_present() by read().
> > > 
> > > Furthermore, Instead of having two global variable, it's better to use a
> > > private struct. This will permit to remove amd_pdev variable.
> > > 
> > > Finally, Instead of accessing hw directly via pmbase, it's better to
> > > access after ioport_map() via ioread32/iowrite32.
> > 
> > I was going to recommend a better $subject line, but now I see why it's
> > vague. :(  I would recommend breaking this patch up into three:
> > 
> >   hwrng: amd - Access hardware via ioread32/iowrite32
> >   hwrng: amd - Replace global variable with private struct
> >   hwrng: amd - Convert to new hwrng read() API
> > 
> 
> That was my first idea, but believed that it wasnt worth it.

When working with crypto/rng code, I'm a firm believer in moving
cautiously and deliberately. :-)

> Anyway I will do it.

Thanks!

thx,

Jason.