[Xen-devel] [PATCH] VT-d minor edge case memory leak

["Ross Philipson" <Ross.Philipson@xxxxxxxxxx>]

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>

diff -Nur a/xen/drivers/passthrough/vtd/iommu.c
b/xen/drivers/passthrough/vtd/iommu.c
--- a/xen/drivers/passthrough/vtd/iommu.c       2008-09-12
08:40:15.000000000 -0400
+++ b/xen/drivers/passthrough/vtd/iommu.c       2008-09-12
15:13:36.000000000 -0400
@@ -152,6 +152,7 @@
         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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