On Thu, Jan 09, 2014 at 09:58:42AM +0800, ethan zhao wrote: > drivers/iommu/intel-iommu.c | 2 ++ > 1 files changed, 2 insertions(+), 0 deletions(-) > > diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c > index 40203ad..5b4531a 100644 > --- a/drivers/iommu/intel-iommu.c > +++ b/drivers/iommu/intel-iommu.c > @@ -1105,6 +1105,8 @@ static struct device_domain_info > *iommu_support_dev_iotlb( > struct device_domain_info *info; > struct intel_iommu *iommu = device_to_iommu(segment, bus, devfn); > > + if (!iommu) > + return NULL; > if (!ecap_dev_iotlb_support(iommu->ecap)) > return NULL; This call can not fail, iommu_support_dev_iotlb() is only called from domain_context_mapping_one() which does the iommu==NULL check on its own before the call. Joerg -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
