From: Xiubo Li <Li.Xiubo@freescale.com>
Date: Sun, 28 Sep 2014 08:57:15 +0000 (-0700)
Subject: led: gpio: Fix possible ZERO_SIZE_PTR pointer dereferencing error.
X-Git-Tag: fixes-against-v3.18-rc2~23^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a823e76138466225d0a9f45520c5654132939a01;p=pandora-kernel.git

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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