From 22463cab3f96baf6b568200a35c7648438eea7ff Mon Sep 17 00:00:00 2001
From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Date: Thu, 24 Jul 2014 15:34:54 +0200
Subject: [PATCH] iommu/ipmmu-vmsa: Flush P[UM]D entry before freeing the child
 page table

When clearing PUD or PMD entries the child page table (if any) is freed
and the PUD or PMD entry is then cleared. This result in a small race
condition window during which a free page table could be accessed by the
IPMMU.

Fix it by clearing and flushing the PUD or PMD entry before freeing the
child page table.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
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