This patch corrects the parameter handling of ppc64_cpu when setting the
run-mode.  The PAPR specifies that the rtas_[get|set]_system_parameter calls
take a char buffer, but for the run mode it actually wants integer values in
the buffer, not strings.  This updates the handling of the values to be
integers.

This patch also add an additional error message to indicate failure when a
partition is not authorized to set the run mode.

Signed-off-by:Nathan Fontenot <nfont@austin.ibm.com>
---

Index: powerpc-utils-1.2.2/src/ppc64_cpu.c
===================================================================
--- powerpc-utils-1.2.2.orig/src/ppc64_cpu.c	2010-06-10 13:22:02.000000000 -0500
+++ powerpc-utils-1.2.2/src/ppc64_cpu.c	2010-06-10 13:33:09.810455522 -0500
@@ -416,11 +416,11 @@
 				printf("Could not retrieve current diagnostics "
 				       "mode\n");
 		} else
-			printf("run-mode=%c\n", mode[2]);
+			printf("run-mode=%d\n", mode[2]);
 	} else {
-		signed char rmode = *run_mode;
+		short rmode = atoi(run_mode);
 
-		if (rmode < '0' || rmode > '3') {
+		if (rmode < 0 || rmode > 3) {
 			printf("Invalid run-mode=%c\n", rmode);
 			return -1;
 		}
@@ -433,6 +433,9 @@
 			if (rc == -3)
 				printf("Machine does not support diagnostic "
 				       "run mode\n");
+			else if (rc == -9002)
+				printf("Machine is not authorized to set "
+				       "diagnostic run mode\n");
 			else
 				printf("Could not set diagnostics mode\n");
 		}