diff mbox series

[v1,1/2] intel_iommu: a fix to vtd_find_as_from_bus_num()

Message ID 1578058086-4288-2-git-send-email-yi.l.liu@intel.com (mailing list archive)
State New, archived
Headers show
Series intel_iommu: two fixes to intel scalable vIOMMU | expand

Commit Message

Yi Liu Jan. 3, 2020, 1:28 p.m. UTC 
Ensure the return value of vtd_find_as_from_bus_num() is NULL by
enforcing vtd_bus=NULL. This would help caller of vtd_find_as_from_bus_num()
to decide if any further operation on the returned vtd_bus.

Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Yi Sun <yi.y.sun@linux.intel.com>
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
---
 hw/i386/intel_iommu.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 43c94b9..00ebae4 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -948,6 +948,7 @@  static VTDBus *vtd_find_as_from_bus_num(IntelIOMMUState *s, uint8_t bus_num)
                 return vtd_bus;
             }
         }
+        vtd_bus = NULL;
     }
     return vtd_bus;
 }