From 57886518a8cdd319a04f5ea06a5f7ffcb8a93120 Mon Sep 17 00:00:00 2001
From: Joerg Roedel <joro@8bytes.org>
Date: Tue, 29 Jan 2013 13:41:09 +0100
Subject: [PATCH] iommu: Check for valid pgsize_bitmap in iommu_map/unmap

In case the page-size bitmap is zero the code path in
iommu_map and iommu_unmap is undefined. Make it defined and
return -ENODEV in this case.

Signed-off-by: Joerg Roedel <joro@8bytes.org>
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