From 51df62ff74b371866c1006dee887a8e42838c1f2 Mon Sep 17 00:00:00 2001
From: Pratyush Anand <pratyush.anand@st.com>
Date: Fri, 4 Jul 2014 17:01:27 +0300
Subject: [PATCH] usb: allow lpm (en/dis)able only if device is atleast in
 default state

When a USB device is disconnected, usb_unbind_interface is called, which
tries to enable and disable LPM. usb_enable_lpm also try to send a
control command SET SEL to the device.
Since device is already disconnected, therefore it does not make sense
to execute usb_(en/dis)able_lpm.
This patch returns from usb_(en/dis)able_lpm, if device was not in
default state atleast.

Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Tested-by: Aymen Bouattay <aymen.bouattay@st.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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