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Date: Wed, 17 Jun 2015 17:50:01 +0800
From: Herbert Xu <herbert@gondor.apana.org.au>
To: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: "David S. Miller" <davem@davemloft.net>, linux-crypto@vger.kernel.org,
        Arnaud Ebalard <arno@natisbad.org>, Tawfik Bayouk <tawfik@marvell.com>,
        Lior Amsalem <alior@marvell.com>, Nadav Haklai <nadavh@marvell.com>,
        Eran Ben-Avi <benavi@marvell.com>,
        Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
        Gregory CLEMENT <gregory.clement@free-electrons.com>,
        Jason Cooper <jason@lakedaemon.net>,
        Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
        Andrew Lunn <andrew@lunn.ch>, Rob Herring <robh+dt@kernel.org>,
        Pawel Moll <pawel.moll@arm.com>, Mark Rutland <mark.rutland@arm.com>,
        Ian Campbell <ijc+devicetree@hellion.org.uk>,
        Kumar Gala <galak@codeaurora.org>, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        Jason Gunthorpe <jgunthorpe@obsidianresearch.com>,
        Imre Kaloz <kaloz@openwrt.org>
Subject: Re: [PATCH v6 05/14] crypto: marvell/CESA: add TDMA support
Message-ID: <20150617095001.GA11538@gondor.apana.org.au>
References: <1434527142-3609-1-git-send-email-boris.brezillon@free-electrons.com>
 <1434527142-3609-6-git-send-email-boris.brezillon@free-electrons.com>
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On Wed, Jun 17, 2015 at 09:45:33AM +0200, Boris Brezillon wrote:
>
> +	ret = dma_map_sg(cesa_dev->dev, req->src, creq->src_nents,
> +			 DMA_TO_DEVICE);
> +	if (!ret)
> +		return -ENOMEM;
> +
> +	creq->src_nents = ret;

DMA-API-HOWTO says that you must retain the original nents and
use it when you call dma_unmap_sg.  So I'm afraid one more repost
is needed :)

Thanks,
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

From mboxrd@z Thu Jan  1 00:00:00 1970
From: herbert@gondor.apana.org.au (Herbert Xu)
Date: Wed, 17 Jun 2015 17:50:01 +0800
Subject: [PATCH v6 05/14] crypto: marvell/CESA: add TDMA support
In-Reply-To: <1434527142-3609-6-git-send-email-boris.brezillon@free-electrons.com>
References: <1434527142-3609-1-git-send-email-boris.brezillon@free-electrons.com>
 <1434527142-3609-6-git-send-email-boris.brezillon@free-electrons.com>
Message-ID: <20150617095001.GA11538@gondor.apana.org.au>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Wed, Jun 17, 2015 at 09:45:33AM +0200, Boris Brezillon wrote:
>
> +	ret = dma_map_sg(cesa_dev->dev, req->src, creq->src_nents,
> +			 DMA_TO_DEVICE);
> +	if (!ret)
> +		return -ENOMEM;
> +
> +	creq->src_nents = ret;

DMA-API-HOWTO says that you must retain the original nents and
use it when you call dma_unmap_sg.  So I'm afraid one more repost
is needed :)

Thanks,
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt