diff --git a/include/linux/pci.h b/include/linux/pci.h
index e30ceea..cfff32f 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1373,6 +1373,8 @@
 #define PCI_VPD_LRDT_TAG_SIZE		3
 #define PCI_VPD_SRDT_TAG_SIZE		1
 
+#define PCI_VPD_INFO_FLD_HDR_SIZE	3
+
 /**
  * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
  * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
@@ -1396,6 +1398,17 @@
 }
 
 /**
+ * pci_vpd_info_field_size - Extracts the information field length
+ * @lrdt: Pointer to the beginning of an information field header
+ *
+ * Returns the extracted information field length.
+ */
+static inline u8 pci_vpd_info_field_size(const u8 *info_field)
+{
+	return info_field[2];
+}
+
+/**
  * pci_vpd_find_tag - Locates the Resource Data Type tag provided
  * @buf: Pointer to buffered vpd data
  * @off: The offset into the buffer at which to begin the search