From 6596aa047b624aeec2ea321962cfdecf9953a383 Mon Sep 17 00:00:00 2001
From: Xiubo Li <Li.Xiubo@freescale.com>
Date: Sun, 28 Sep 2014 17:29:37 +0800
Subject: [PATCH] ASoC: core: fix possible ZERO_SIZE_PTR pointer dereferencing
 error.

Since we cannot make sure the 'params->num_regs' will always be none
zero here, and then if it equals to zero, the kmemdup() will return
ZERO_SIZE_PTR, which equals to ((void *)16).

So this patch fix this with just doing the zero check before calling
kmemdup().

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
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