linux-kernel - Re: [PATCH v2 1/4] crypto x86/sha1

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Message-ID: <20160201081751.GC5818@gondor.apana.org.au>
Date:	Mon, 1 Feb 2016 16:17:51 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Rui Wang <rui.y.wang@...el.com>
Cc:	tim.c.chen@...ux.intel.com, linux-crypto@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/4] crypto x86/sha1_mb: Fix load failure

On Wed, Jan 27, 2016 at 05:08:35PM +0800, Rui Wang wrote:
>
> +static int sha1_mb_async_import(struct ahash_request *req, const void *in)
> +{
> +	struct ahash_request *mcryptd_req = ahash_request_ctx(req);
> +	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
> +	struct sha1_mb_ctx *ctx = crypto_ahash_ctx(tfm);
> +	struct mcryptd_ahash *mcryptd_tfm = ctx->mcryptd_tfm;
> +	struct crypto_shash *child = mcryptd_ahash_child(mcryptd_tfm);
> +	struct mcryptd_hash_request_ctx *rctx;
> +	struct shash_desc *desc;
> +	int err;
> +
> +	memcpy(mcryptd_req, req, sizeof(*req));
> +	ahash_request_set_tfm(mcryptd_req, &mcryptd_tfm->base);
> +	rctx = ahash_request_ctx(mcryptd_req);
> +	desc = &rctx->desc;
> +	desc->tfm = child;
> +	desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
> +
> +	err = crypto_shash_init(desc);
> +	if (err)
> +		return err;

What is this desc for?

> +	return crypto_ahash_import(mcryptd_req, in);
> +}

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