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crypto: qat - Prevent dma mapping zero length assoc data
authorTadeusz Struk <tadeusz.struk@intel.com>
Tue, 14 Oct 2014 01:24:26 +0000 (18:24 -0700)
committerHerbert Xu <herbert@gondor.apana.org.au>
Fri, 24 Oct 2014 14:37:33 +0000 (22:37 +0800)
Do not attempt to dma map associated data if it is zero length.

Cc: stable@vger.kernel.org
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Tested-by: Nikolay Aleksandrov <nikolay@redhat.com>
Reviewed-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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