linux-kernel - Re: [PATCH v5 04/19] crypto: marvell/cesa: remove redundant backlog checks on EBUSY

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Date:   Tue, 15 Aug 2017 10:16:29 +0200
From:   Boris Brezillon <boris.brezillon@...e-electrons.com>
To:     Gilad Ben-Yossef <gilad@...yossef.com>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Jonathan Corbet <corbet@....net>,
        David Howells <dhowells@...hat.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Gary Hook <gary.hook@....com>,
        Arnaud Ebalard <arno@...isbad.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Alasdair Kergon <agk@...hat.com>,
        Mike Snitzer <snitzer@...hat.com>, dm-devel@...hat.com,
        Shaohua Li <shli@...nel.org>, Steve French <sfrench@...ba.org>,
        "Theodore Y. Ts'o" <tytso@....edu>,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        Mimi Zohar <zohar@...ux.vnet.ibm.com>,
        Dmitry Kasatkin <dmitry.kasatkin@...il.com>,
        James Morris <james.l.morris@...cle.com>,
        "Serge E. Hallyn" <serge@...lyn.com>, linux-crypto@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        keyrings@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-raid@...r.kernel.org,
        linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org,
        linux-fscrypt@...r.kernel.org,
        linux-ima-devel@...ts.sourceforge.net,
        linux-ima-user@...ts.sourceforge.net,
        linux-security-module@...r.kernel.org,
        Ofir Drang <ofir.drang@....com>
Subject: Re: [PATCH v5 04/19] crypto: marvell/cesa: remove redundant backlog
 checks on EBUSY

Le Mon, 14 Aug 2017 18:21:14 +0300,
Gilad Ben-Yossef <gilad@...yossef.com> a écrit :

> Now that -EBUSY return code only indicates backlog queueing
> we can safely remove the now redundant check for the
> CRYPTO_TFM_REQ_MAY_BACKLOG flag when -EBUSY is returned.
> 
> Signed-off-by: Gilad Ben-Yossef <gilad@...yossef.com>

Acked-by: Boris Brezillon <boris.brezillon@...e-electrons.com>

> ---
>  drivers/crypto/marvell/cesa.c | 3 +--
>  drivers/crypto/marvell/cesa.h | 2 +-
>  2 files changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/crypto/marvell/cesa.c b/drivers/crypto/marvell/cesa.c
> index 6e7a5c7..269737f 100644
> --- a/drivers/crypto/marvell/cesa.c
> +++ b/drivers/crypto/marvell/cesa.c
> @@ -183,8 +183,7 @@ int mv_cesa_queue_req(struct crypto_async_request *req,
>  	spin_lock_bh(&engine->lock);
>  	ret = crypto_enqueue_request(&engine->queue, req);
>  	if ((mv_cesa_req_get_type(creq) == CESA_DMA_REQ) &&
> -	    (ret == -EINPROGRESS ||
> -	    (ret == -EBUSY && req->flags & CRYPTO_TFM_REQ_MAY_BACKLOG)))
> +	    (ret == -EINPROGRESS || ret == -EBUSY)
>  		mv_cesa_tdma_chain(engine, creq);
>  	spin_unlock_bh(&engine->lock);
>  
> diff --git a/drivers/crypto/marvell/cesa.h b/drivers/crypto/marvell/cesa.h
> index b7872f6..63c8457 100644
> --- a/drivers/crypto/marvell/cesa.h
> +++ b/drivers/crypto/marvell/cesa.h
> @@ -763,7 +763,7 @@ static inline int mv_cesa_req_needs_cleanup(struct crypto_async_request *req,
>  	 * the backlog and will be processed later. There's no need to
>  	 * clean it up.
>  	 */
> -	if (ret == -EBUSY && req->flags & CRYPTO_TFM_REQ_MAY_BACKLOG)
> +	if (ret == -EBUSY)
>  		return false;
>  
>  	/* Request wasn't queued, we need to clean it up */