From: Felipe Balbi <balbi@ti.com>
Date: Mon, 2 Feb 2015 22:24:17 +0000 (-0600)
Subject: usb: gadget: function: phonet: balance usb_ep_disable calls
X-Git-Tag: omap-for-v4.1/wl12xx-dt~45^2~10^2~13
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9ec36f7fe20ef919cc15171e1da1b6739222541a;p=pandora-kernel.git

usb: gadget: function: phonet: balance usb_ep_disable calls

f_phonet's ->set_alt() method will call usb_ep_disable()
potentially on an endpoint which is already disabled. That's
something the gadget/function driver must guarantee that it's
always balanced.

In order to balance the calls, just make sure the endpoint
was enabled before by means of checking the validity of
driver_data.

Reported-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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