From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Mon, 5 Jan 2015 20:54:41 +0000 (+1100)
Subject: crypto: qat - Fix incorrect uses of memzero_explicit
X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~90^2~34
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ad511e260a27b8e35d273cc0ecfe5a8ff9543181;p=pandora-kernel.git

crypto: qat - Fix incorrect uses of memzero_explicit

memzero_explicit should only be used on stack variables that get
zapped just before they go out of scope.

This patch replaces all unnecessary uses of memzero_explicit with
memset, removes two memzero_explicit calls altogether as the tfm
context comes pre-zeroed, and adds a missing memzero_explicit of
the stack variable buff in qat_alg_do_precomputes.  The memzeros
on ipad/opad + digest_size/auth_keylen are also removed as the
entire auth_state is already zeroed on entry.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Tadeusz Struk <tadeusz.struk@intel.com>
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