linux-kernel - Re: [BUGFIX -v2 for .32] crypto, gcm, fix another complete call in complete fuction

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Date:	Tue, 10 Nov 2009 10:49:59 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>
Subject: Re: [BUGFIX -v2 for .32] crypto, gcm, fix another complete call in
 complete fuction

On Tue, 2009-11-10 at 03:02 +0800, Herbert Xu wrote: 
> On Mon, Nov 09, 2009 at 03:24:14PM +0800, Huang Ying wrote:
> > The flow of the complete function (xxx_done) in gcm.c is as follow:
> 
> Thanks the patch looks pretty good overall.
> 
> > -static void gcm_hash_final_done(struct crypto_async_request *areq,
> > -				int err)
> > +static void __gcm_hash_final_done(struct aead_request *req,
> > +				  struct crypto_gcm_req_priv_ctx *pctx,
> > +				  int err)
> 
> Just one nit though, do we really need to carry this pctx around
> everywhere? It seems to me that it's always crypto_gcm_reqctx(req),
> no?

Yes. This is for performance only. Because crypto_gcm_reqctx(req) is not
so trivial (it needs access tfm), and used by every xxx_done function,
so I think it is better to just call crypto_gcm_reqctx once and pass it
down. Do you think so?

Best Regards,
Huang Ying

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