Index: powerpc-utils/src/ppc64_cpu.c
===================================================================
--- powerpc-utils.orig/src/ppc64_cpu.c	2010-01-22 14:21:23.000000000 -0600
+++ powerpc-utils/src/ppc64_cpu.c	2010-04-15 09:43:48.000000000 -0500
@@ -389,7 +389,7 @@
 	} else {
 		signed char rmode = *run_mode;
 
-		if (rmode < 0 || rmode > 3) {
+		if (rmode < '0' || rmode > '3') {
 			printf("Invalid run-mode=%c\n", rmode);
 			return -1;
 		}
@@ -423,6 +423,9 @@
 			if (rc == -3)
 				printf("Machine does not support diagnostic "
 				       "run mode\n");
+			else if (rc == -9002)
+				printf("Machine is not authorized to set "
+				       "diagnostic mode\n");
 			else
 				printf("Could not set diagnostics mode\n");
 		}