From: Jacob Pan <jacob.jun....@linux.intel.com> original code fails when LAST_PAGE is set in flags.
Signed-off-by: Jacob Pan <jacob.jun....@linux.intel.com> Signed-off-by: Liu Yi L <yi.l....@intel.com> Signed-off-by: Yi Sun <yi.y....@linux.intel.com> --- drivers/iommu/iommu.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 8c470f4..053cec3 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1200,9 +1200,11 @@ int iommu_page_response(struct device *dev, return -EINVAL; if (msg->version != IOMMU_PAGE_RESP_VERSION_1 || - msg->flags & ~IOMMU_PAGE_RESP_PASID_VALID) + !(msg->flags & IOMMU_PAGE_RESP_PASID_VALID)) { + dev_warn_ratelimited(dev, "%s:Invalid ver %x: flags %x\n", + __func__, msg->version, msg->flags); return -EINVAL; - + } /* Only send response if there is a fault report pending */ mutex_lock(¶m->fault_param->lock); if (list_empty(¶m->fault_param->faults)) { -- 2.7.4 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu