iommu/vt-d: Use struct_size() helper

[linux.git] / drivers / iommu / dmar.c

diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 9c49300e9fb76ace67cee9930356794234de81d0..6d969a172fbb3491df6b1d38cc6f3b33cd99a4d0 100644 (file)
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -145,7 +145,7 @@ dmar_alloc_pci_notify_info(struct pci_dev *dev, unsigned long event)
                for (tmp = dev; tmp; tmp = tmp->bus->self)
                        level++;
 
-       size = sizeof(*info) + level * sizeof(info->path[0]);
+       size = struct_size(info, path, level);
        if (size <= sizeof(dmar_pci_notify_info_buf)) {
                info = (struct dmar_pci_notify_info *)dmar_pci_notify_info_buf;
        } else {