From 7042e8f2f6f5c76b6173748570312bbeb044c7dd Mon Sep 17 00:00:00 2001
From: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Date: Sun, 20 Jul 2014 11:42:07 +0800
Subject: [PATCH] usb: gadget: Fix return value check in ep_write()

In case of error, the function memdup_user() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check
should be replaced with IS_ERR().

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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