From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Mon, 27 Jun 2011 07:45:19 +0000 (+0800)
Subject: crypto: algif_hash - Handle initial af_alg_make_sg error correctly
X-Git-Tag: v3.1-rc1~266^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=269230e7c52623cda279010c8032a6f5b59caaaf;p=pandora-kernel.git

crypto: algif_hash - Handle initial af_alg_make_sg error correctly

When the first call to af_alg_make_sg fails, we may return garbage
instead of the real error.  This patch fixes it by setting the error
if "copied" is zero.

Based on a patch by Jesper Juhl.

Reported-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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