linux-kernel - Re: [PATCH v2 1/2] crypto: engine: permit to enqueue ashash

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Message-ID: <20160602091940.GB16160@gondor.apana.org.au>
Date:	Thu, 2 Jun 2016 17:19:40 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	LABBE Corentin <clabbe.montjoie@...il.com>
Cc:	davem@...emloft.net, baolin.wang@...aro.org,
	linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] crypto: engine: permit to enqueue ashash_request

On Thu, Jun 02, 2016 at 11:12:13AM +0200, LABBE Corentin wrote:
> On Thu, Jun 02, 2016 at 04:32:59PM +0800, Herbert Xu wrote:
> > On Mon, May 30, 2016 at 03:32:01PM +0200, LABBE Corentin wrote:
> > > The current crypto engine allow only ablkcipher_request to be enqueued.
> > > Thus denying any use of it for hardware that also handle hash algo.
> > > 
> > > This patch convert all ablkcipher_request references to the
> > > more general crypto_async_request.
> > > 
> > > Signed-off-by: LABBE Corentin <clabbe.montjoie@...il.com>
> > 
> > First of all your patches break bisection which is unacceptable.
> > 
> 
> How do I break bisection ?

Because the kernel won't compile after your first patch.

Either do it as one single patch or use the more elaborate "new
interafce" + "switchover" + "delete old interface" ritual.

> So, if my hwcrypto can handle hash and ciphers, I need to have two engine and each crypt_one_request()/hash_one_request()
> need to lock the engine.
> Having only one engine that handle all types permit to avoid this locking.

OK then we should add some type-checking as you suggested.  What
I don't want is just blind casting by the user of crypto_engine.

Thanks,
-- 
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