From 2cf93bea3d7b2dbf1e0ebfa9d381aad1b637e2aa Mon Sep 17 00:00:00 2001
From: George Cherian <george.cherian@ti.com>
Date: Fri, 8 Nov 2013 10:50:52 +0530
Subject: [PATCH] usb: gadget: f_mass_storage: call try_to_freeze only when its
 safe

Call try_to_freeze() in sleep_thread() only when it's safe to sleep.
do_read() and do_write() calls sleep_thread with lock held.
Make sure these won't call try_to_freeze() by passing can_freeze flag
to sleep_thread.

Calling try_to_freeze() with a lock hold was done since day one in
f_mass_storage but since commit 0f9548ca1 ("lockdep: check that no
locks held at freeze time") lockdep complains about it.

Signed-off-by: George Cherian <george.cherian@ti.com>
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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