From 5fb3f55504d5d9b6ca97131091707afd351fe1dc Mon Sep 17 00:00:00 2001
From: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
Date: Wed, 26 Nov 2014 20:25:44 -0300
Subject: [PATCH] [media] media: usb: uvc: use vb2_ops_wait_prepare/finish
 helper

This patch drops driver specific wait_prepare() and wait_finish()
callbacks from vb2_ops and instead uses the the helpers
vb2_ops_wait_prepare/finish() provided by the vb2 core, the lock member
of the queue needs to be initalized to a mutex so that vb2 helpers
vb2_ops_wait_prepare/finish() can make use of it.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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