From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Thu, 13 Dec 2007 16:44:11 +0000 (+0800)
Subject: [CRYPTO] scatterwalk: Handle zero nbytes in scatterwalk_map_and_copy
X-Git-Tag: v2.6.25-rc1~1242^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6e050778c5d08a97d5d98f7cb62bc503e872615c;p=pandora-kernel.git

[CRYPTO] scatterwalk: Handle zero nbytes in scatterwalk_map_and_copy

It's better to return silently than crash and burn when someone feeds us
a zero length.  In particular the null digest algorithm when used as part
of authenc will do that to us.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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