linux-kernel - Re: [PATCH v1 0/2] scatterlist: introduce sg_nents_for

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Message-ID: <20150603050906.GC3884@gondor.apana.org.au>
Date:	Wed, 3 Jun 2015 13:09:06 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Tom Lendacky <thomas.lendacky@....com>
Cc:	linux-crypto@...r.kernel.org, David Miller <davem@...emloft.net>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 0/2] scatterlist: introduce sg_nents_for_len

On Mon, Jun 01, 2015 at 11:15:19AM -0500, Tom Lendacky wrote:
> This series introduces and makes use of a new scatterlist function named
> sg_nents_for_len. The purpose of this function is determine the number
> of scatterlist entries required to satisify a specified length. The
> resulting count can be used as input to the dma_map_sg function to map
> only the entries needed.
> 
> This function is needed for cases where a supplied scatterlist has not
> marked the last filled sg entry as the end of the scatterlist. In these
> cases, the sg_nents function count includes sg entries that may not have
> been filled in. When using this value in a dma_map_sg call it can result
> in errors/bugs being generated.
> 
> The following patches are included in this series:
> - Introduce the sg_nents_for_len function
> - Update the ccp driver to use the sg_nents_for_len function
> 
> This patch series is based on cryptodev-2.6.

Both applied.  Thanks.
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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