1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index dc9f14811e0f..58dc70bffd5b 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -144,7 +144,7 @@ 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(struct acpi_dmar_pci_path);
+        size = sizeof(*info) + level * sizeof(info->path[0]);
         if (size <= sizeof(dmar_pci_notify_info_buf)) {
                 info = (struct dmar_pci_notify_info *)dmar_pci_notify_info_buf;
         } else {