1 files changed, 5 insertions, 0 deletions
diff --git a/src/usr/pnor/ast_mboxdd.C b/src/usr/pnor/ast_mboxdd.C
index b7504e934..5b6e58300 100644
--- a/src/usr/pnor/ast_mboxdd.C
+++ b/src/usr/pnor/ast_mboxdd.C
@@ -365,6 +365,11 @@ errlHndl_t astMbox::initializeMbox(void)
 
     do
     {
+        // The BMC may have disabled SIO access, but there's not much point in
+        // testing whether it's available as there's no alternative action if
+        // it is not. Instead, just try the SIO accesses and bail out with the
+        // errl if they fail.
+
         //First disable SIO Mailbox engine to configure it
         // 0x30 - Enable/Disable Reg
         l_data = SIO::DISABLE_DEVICE;