From: Keir Fraser <keir.fraser@citrix.com>
Date: Mon, 4 Aug 2008 10:12:15 +0000 (+0100)
Subject: vtd: Fix a missing spin_unlock_irqrestore()
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14165^2~36
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=3df4abafb50f32da655c8758720847dbd703627f;p=xen.git

vtd: Fix a missing spin_unlock_irqrestore()

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

diff --git a/xen/drivers/passthrough/vtd/iommu.c b/xen/drivers/passthrough/vtd/iommu.c
index 8de32f476b..e573bafd44 100644
--- a/xen/drivers/passthrough/vtd/iommu.c
+++ b/xen/drivers/passthrough/vtd/iommu.c
@@ -632,7 +632,10 @@ static int iommu_set_root_entry(struct iommu *iommu)
 
     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;