From c1f43dd9c20d85e66c4d77e284f64ac114abe3f8 Mon Sep 17 00:00:00 2001
From: Xuelin Shi <xuelin.shi@freescale.com>
Date: Wed, 21 May 2014 14:02:37 -0700
Subject: [PATCH] dmaengine: fix dmaengine_unmap failure

The count which is used to get_unmap_data maybe not the same as the
count computed in dmaengine_unmap which causes to free data in a
wrong pool.

This patch fixes this issue by keeping the map count with unmap_data
structure and use this count to get the pool.

Cc: <stable@vger.kernel.org>
Signed-off-by: Xuelin Shi <xuelin.shi@freescale.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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