From a823e76138466225d0a9f45520c5654132939a01 Mon Sep 17 00:00:00 2001
From: Xiubo Li <Li.Xiubo@freescale.com>
Date: Sun, 28 Sep 2014 01:57:15 -0700
Subject: [PATCH] led: gpio: Fix possible ZERO_SIZE_PTR pointer dereferencing
 error.

Since we cannot make sure the 'pdata->num_leds' 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: Bryan Wu <cooloney@gmail.com>
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