From 923a6e5e5f171317ac8bb462ac4b814fa7880d3c Mon Sep 17 00:00:00 2001
From: Tadeusz Struk <tadeusz.struk@intel.com>
Date: Mon, 13 Oct 2014 18:24:26 -0700
Subject: [PATCH] crypto: qat - Prevent dma mapping zero length assoc data

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>
---
Reading git-format-patch failed