Return code cleanups.

Change-Id: I375c2f895f28b73948aa384dda781b31f027719b
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/334
Tested-by: Jenkins Server
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/src/include/sys/msg.h b/src/include/sys/msg.h
index 215da312e..be7ba397a 100644
--- a/src/include/sys/msg.h
+++ b/src/include/sys/msg.h
@@ -171,7 +171,11 @@ ALWAYS_INLINE
   *
   * @param[in] q - message queue
   * @param[in] msg - message
-  * @return    Always returns zero.
+  *
+  * @return Status of message send.
+  * @retval 0 - Success
+  * @retval -EINVAL - Invalid pointer passed to kernel.
+  * @retval -EINVAL - Message type is in kernel range.
   */
 int msg_send(msg_q_t q, msg_t* msg);
 
@@ -197,7 +201,10 @@ int msg_sendrecv(msg_q_t q, msg_t* msg);
   *
   * @param[in] q - message queue
   * @param[in] msg - response message
+  *
   * @return Zero on success, else negative.
+  * @retval -EBADF - Message was not sent synchronously.
+  *
   */
 int msg_respond(msg_q_t q, msg_t* msg);