From 7703eac96abd119dcfbb04f287a5127462d18269 Mon Sep 17 00:00:00 2001
From: Russell King - ARM Linux <linux@arm.linux.org.uk>
Date: Wed, 31 Aug 2011 09:34:35 +0100
Subject: [PATCH] dmaengine: amba-pl08x: make filter check that the channel is
 owned by pl08x

Before converting the dma channel to our private data structure, first
check that the channel is indeed one which our driver registered.  We
do this by ensuring that the underlying device is bound to our driver.

This avoids potential oopses if we try to reference 'plchan->name'
against a foreign drivers dma channel.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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