[Xen-changelog] [xen-unstable] vtd: minor edge case memory leak

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1221474920 -3600
# Node ID 01fb29f7283247951bb822684febbf20ecbaed45
# Parent  c353f07bae84133a83ec1dbf54bc5f868fd45bb2
vtd: minor edge case memory leak

Fixes an (unlikely) memory leak where mapped VT-d root entries are not
unmapped on allocation failure code path.

Signed-off-by: Ross Philipson <ross.philipson@xxxxxxxxxx>
---
 xen/drivers/passthrough/vtd/iommu.c |    1 +
 1 files changed, 1 insertion(+)

diff -r c353f07bae84 -r 01fb29f72832 xen/drivers/passthrough/vtd/iommu.c
--- a/xen/drivers/passthrough/vtd/iommu.c       Mon Sep 15 11:34:42 2008 +0100
+++ b/xen/drivers/passthrough/vtd/iommu.c       Mon Sep 15 11:35:20 2008 +0100
@@ -152,6 +152,7 @@ static u64 bus_to_context_maddr(struct i
         maddr = alloc_pgtable_maddr();
         if ( maddr == 0 )
         {
+            unmap_vtd_domain_page(root_entries);
             spin_unlock_irqrestore(&iommu->lock, flags);
             return 0;
         }

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