Received-SPF: pass (google.com: best guess record for domain of linux-crypto-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Horia Geanta <horia.geanta@nxp.com>
To:     Iuliana Prodan <iuliana.prodan@nxp.com>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        Aymen Sghaier <aymen.sghaier@nxp.com>
CC:     "David S. Miller" <davem@davemloft.net>,
        "linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        dl-linux-imx <linux-imx@nxp.com>
Subject: Re: [PATCH v2 09/10] crypto: caam - add crypto_engine support for RSA
 algorithms
Thread-Topic: [PATCH v2 09/10] crypto: caam - add crypto_engine support for
 RSA algorithms
Thread-Index: AQHVwdGq8rD6kVc2eEOuvzLis67wVg==
Date:   Fri, 10 Jan 2020 08:46:12 +0000
Message-ID: <VI1PR0402MB3485162217C242B16CF1371B98380@VI1PR0402MB3485.eurprd04.prod.outlook.com>
References: <1578013373-1956-1-git-send-email-iuliana.prodan@nxp.com>
 <1578013373-1956-10-git-send-email-iuliana.prodan@nxp.com>
Accept-Language: en-US
Content-Language: en-US
received-spf: None (protection.outlook.com: nxp.com does not designate
 permitted sender hosts)
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-Network-Message-Id: c3a1cf64-898d-44f6-b5c6-08d795a98c13
X-MS-Exchange-CrossTenant-originalarrivaltime: 10 Jan 2020 08:46:12.7408
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: zU2lnJcSvoEiSGBS1zWFasgRtwuLibVkYZDaMawW7yAcqJ2SXxT5VaZfDC1jZMrKIj+7c0M1S4eD3jLUXcVJFA==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR0402MB3549
Sender: linux-crypto-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-crypto.vger.kernel.org>
X-Mailing-List: linux-crypto@vger.kernel.org

On 1/3/2020 3:03 AM, Iuliana Prodan wrote:=0A=
> +static int akcipher_enqueue_req(struct device *jrdev, u32 *desc,=0A=
> +				void (*cbk)(struct device *jrdev, u32 *desc,=0A=
> +					    u32 err, void *context),=0A=
> +				struct akcipher_request *req,=0A=
> +				struct rsa_edesc *edesc)=0A=
> +{=0A=
> +	struct caam_drv_private_jr *jrpriv =3D dev_get_drvdata(jrdev);=0A=
> +	struct crypto_akcipher *tfm =3D crypto_akcipher_reqtfm(req);=0A=
> +	struct caam_rsa_ctx *ctx =3D akcipher_tfm_ctx(tfm);=0A=
> +	struct caam_rsa_key *key =3D &ctx->key;=0A=
> +	int ret;=0A=
> +=0A=
> +	if (req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)=0A=
> +		return crypto_transfer_akcipher_request_to_engine(jrpriv->engine,=0A=
> +								  req);=0A=
Resource leak in case transfer fails.=0A=
=0A=
> +	else=0A=
> +		ret =3D caam_jr_enqueue(jrdev, desc, cbk, &edesc->jrentry);=0A=
What's the problem with transferring all requests to crypto engine?=0A=
=0A=
> +=0A=
> +	if (ret !=3D -EINPROGRESS) {=0A=
> +		switch (key->priv_form) {=0A=
> +		case FORM1:=0A=
> +			rsa_priv_f1_unmap(jrdev, edesc, req);=0A=
> +			break;=0A=
> +		case FORM2:=0A=
> +			rsa_priv_f2_unmap(jrdev, edesc, req);=0A=
> +			break;=0A=
> +		case FORM3:=0A=
> +			rsa_priv_f3_unmap(jrdev, edesc, req);=0A=
> +			break;=0A=
> +		default:=0A=
> +			rsa_pub_unmap(jrdev, edesc, req);=0A=
> +		}=0A=
> +		rsa_io_unmap(jrdev, edesc, req);=0A=
> +		kfree(edesc);=0A=
> +	}=0A=
> +=0A=
> +	return ret;=0A=
> +}=0A=
> +=0A=
>  static int caam_rsa_enc(struct akcipher_request *req)=0A=
>  {=0A=
>  	struct crypto_akcipher *tfm =3D crypto_akcipher_reqtfm(req);=0A=
>  	struct caam_rsa_ctx *ctx =3D akcipher_tfm_ctx(tfm);=0A=
> +	struct caam_rsa_req_ctx *req_ctx =3D akcipher_request_ctx(req);=0A=
>  	struct caam_rsa_key *key =3D &ctx->key;=0A=
>  	struct device *jrdev =3D ctx->dev;=0A=
>  	struct rsa_edesc *edesc;=0A=
> @@ -637,13 +726,9 @@ static int caam_rsa_enc(struct akcipher_request *req=
)=0A=
>  	/* Initialize Job Descriptor */=0A=
>  	init_rsa_pub_desc(edesc->hw_desc, &edesc->pdb.pub);=0A=
>  =0A=
> -	ret =3D caam_jr_enqueue(jrdev, edesc->hw_desc, rsa_pub_done,=0A=
> -			      &edesc->jrentry);=0A=
> -	if (ret =3D=3D -EINPROGRESS)=0A=
> -		return ret;=0A=
> -=0A=
> -	rsa_pub_unmap(jrdev, edesc, req);=0A=
> -=0A=
> +	req_ctx->akcipher_op_done =3D rsa_pub_done;=0A=
This initialization could be moved into akcipher_enqueue_req().=0A=
=0A=
> +	return akcipher_enqueue_req(jrdev, edesc->hw_desc, rsa_pub_done,=0A=
> +				    req, edesc);=0A=
edesc, edesc->hw_desc parameters not needed - can be deduced internally=0A=
via req -> req_ctx -> edesc- > hw_desc.=0A=
=0A=
Horia=0A=