Index: uspace/drv/ohci/root_hub.c
===================================================================
--- uspace/drv/ohci/root_hub.c	(revision 7941bd62aed7a52eb16c42da1ef081c9ba7fcf9b)
+++ uspace/drv/ohci/root_hub.c	(revision 8bb61e636ae49f8d68bc354645828b636719e92e)
@@ -420,5 +420,7 @@
  * create answer to port status_request
  *
- * Copy content of corresponding port status register to answer buffer.
+ * Copy content of corresponding port status register to answer buffer. The
+ * format of the port status register and port status data is the same (
+ * see OHCI root hub and USB hub documentation).
  *
  * @param instance root hub instance
@@ -450,5 +452,7 @@
  * create answer to port status_request
  *
- * Copy content of hub status register to answer buffer.
+ * This copies flags in hub status register into the buffer. The format of the
+ * status register and status message is the same, according to USB hub
+ * specification and OHCI root hub specification.
  *
  * @param instance root hub instance