[Xen-devel] [PATCH][vtd] Fix a missing spin_unlock_irqrestore()

["Cui, Dexuan" <dexuan.cui@xxxxxxxxx>]

diff -r f69a23b209c4 xen/drivers/passthrough/vtd/iommu.c
--- a/xen/drivers/passthrough/vtd/iommu.c   Fri Aug 01 15:38:07 2008
+0100
+++ b/xen/drivers/passthrough/vtd/iommu.c   Mon Aug 04 17:55:53 2008
+0800
@@ -632,7 +632,10 @@ static int iommu_set_root_entry(struct i

     iommu->root_maddr = alloc_pgtable_maddr();
     if ( iommu->root_maddr == 0 )
+    {
+        spin_unlock_irqrestore(&iommu->register_lock, flags);
         return -ENOMEM;
+    }

     dmar_writeq(iommu->reg, DMAR_RTADDR_REG, iommu->root_maddr);
     cmd = iommu->gcmd | DMA_GCMD_SRTP;

Signed-off-by: Dexuan Cui <dexuan.cui@xxxxxxxxx>

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