linux-kernel - Re: [PATCH v11 1/2] crypto: AF

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Message-ID: <20150125235550.GB18212@gondor.apana.org.au>
Date:	Mon, 26 Jan 2015 10:55:50 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Stephan Mueller <smueller@...onox.de>
Cc:	Daniel Borkmann <dborkman@...hat.com>,
	'Quentin Gouchet' <quentin.gouchet@...il.com>,
	'LKML' <linux-kernel@...r.kernel.org>,
	linux-crypto@...r.kernel.org, linux-api@...r.kernel.org,
	Neil Horman <nhorman@...driver.com>
Subject: Re: [PATCH v11 1/2] crypto: AF_ALG: add AEAD support

On Wed, Jan 21, 2015 at 02:19:17AM +0100, Stephan Mueller wrote:
>
> +		/* use the existing memory in an allocated page */
> +		if (ctx->merge) {
> +			sg = sgl->sg + sgl->cur - 1;
> +			len = min_t(unsigned long, len,
> +				    PAGE_SIZE - sg->offset - sg->length);
> +			err = memcpy_from_msg(page_address(sg_page(sg)) +
> +					      sg->offset + sg->length,
> +					      msg, len);
> +			if (err)
> +				goto unlock;
> +
> +			sg->length += len;
> +			ctx->merge = (sg->offset + sg->length) &
> +				     (PAGE_SIZE - 1);
> +
> +			ctx->used += len;
> +			copied += len;
> +			size -= len;

Need to add a continue here to recheck size != 0.

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
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