While IOMMU Device-TLB flush timed out, xen calls panic() at present.
However the existing panic() is going to be eliminated, so we must
propagate the IOMMU Device-TLB flush error up to vt-d hardware
initialization.

Signed-off-by: Quan Xu <quan...@intel.com>

CC: Jan Beulich <jbeul...@suse.com>
CC: Kevin Tian <kevin.t...@intel.com>
CC: Feng Wu <feng...@intel.com>
---
 xen/drivers/passthrough/vtd/iommu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/drivers/passthrough/vtd/iommu.c 
b/xen/drivers/passthrough/vtd/iommu.c
index a821306..223522f 100644
--- a/xen/drivers/passthrough/vtd/iommu.c
+++ b/xen/drivers/passthrough/vtd/iommu.c
@@ -2137,8 +2137,8 @@ static int init_vtd_hw(void)
             return -EIO;
         }
     }
-    iommu_flush_all();
-    return 0;
+
+    return iommu_flush_all();
 }
 
 static void __hwdom_init setup_hwdom_rmrr(struct domain *d)
-- 
1.9.1


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