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.t...@intel.com> Cc: Jacob Pan <jacob.jun....@linux.intel.com> Cc: Peter Xu <pet...@redhat.com> Cc: Yi Sun <yi.y....@linux.intel.com> Signed-off-by: Liu Yi L <yi.l....@intel.com> Signed-off-by: Yi Sun <yi.y....@linux.intel.com> --- hw/i386/intel_iommu.c | 1 + 1 file changed, 1 insertion(+) 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; } -- 2.7.4