[rtems commit] libchip/serial/mc68681.c: Add error check

[Joel Sherrill]

Module:    rtems
Branch:    master
Commit:    17d1aa7cc0553eb64005359fbaddd09175d1af7c
Changeset: http://git.rtems.org/rtems/commit/?id=17d1aa7cc0553eb64005359fbaddd09175d1af7c

Author:    Joel Sherrill <joel at rtems.org>
Date:      Mon Mar 13 10:41:53 2017 -0500

libchip/serial/mc68681.c: Add error check

This was spotted by Coverity Scan.

---

 c/src/libchip/serial/mc68681.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/c/src/libchip/serial/mc68681.c b/c/src/libchip/serial/mc68681.c
index afa850e..52e92d5 100644
--- a/c/src/libchip/serial/mc68681.c
+++ b/c/src/libchip/serial/mc68681.c
@@ -586,6 +586,8 @@ MC68681_STATIC int mc68681_baud_rate(
     baud_requested = B9600;              /* default to 9600 baud */
 
   baud_requested = rtems_termios_baud_to_index( baud_requested );
+  if (baud_requested == -1)
+    return -1;
 
   baud_tbl = (mc68681_baud_table_t *)
      ((uintptr_t)Console_Port_Tbl[minor]->ulClock);