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+What:           /sys/bus/pci/devices/.../vpd
+Date:           February 2008
+Contact:        Ben Hutchings <bhutchings@solarflare.com>
+Description:
+                A file named vpd in a device directory will be a
+                binary file containing the Vital Product Data for the
+                device.  It should follow the VPD format defined in
+                PCI Specification 2.1 or 2.2, but users should consider
+                that some devices may have malformatted data.  If the
+                underlying VPD has a writable section then the
+                corresponding section of this file will be writable.