post/lib_powerpc/multi.c: fix stack overflow error

The code and comment disagreed: the comment claimed that r6...r31
were copied, and consequently the arrays for "src" and "dst" were
declared with 26 entries, but the actual code ("lmw r5,0(r3)" and
"stmw r5,0(r4)") copied _27_ words (r5 through r31), which resulted
in false "POST cpu Error at multi test" messages.

Fix the comment and the array sizes.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefan Roese <sr@denx.de>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Kim Phillips <kim.phillips@freescale.com>
Cc: Andy Fleming <afleming@gmail.com>
Acked-by: Anatolij Gustschin <agust@denx.de>
Tested-by: Anatolij Gustschin <agust@denx.de>

diff --git a/post/lib_powerpc/multi.c b/post/lib_powerpc/multi.c
index f9fe719da87bf70a68e6ba538bf4eda4691ec60a..e9814a6b07e76adc713025e1ef62c936cb5a27f6 100644 (file)
--- a/post/lib_powerpc/multi.c
+++ b/post/lib_powerpc/multi.c
@@ -27,9 +27,9 @@
  * CPU test
  * Load/store multiple word instructions:      lmw, stmw
  *
- * 26 consecutive words are loaded from a source memory buffer
- * into GPRs r6 through r31. After that, 26 consecutive words are stored
- * from the GPRs r6 through r31 into a target memory buffer. The contents
+ * 27 consecutive words are loaded from a source memory buffer
+ * into GPRs r5 through r31. After that, 27 consecutive words are stored
+ * from the GPRs r5 through r31 into a target memory buffer. The contents
  * of the source and target buffers are then compared.
  */
 
@@ -44,7 +44,7 @@ int cpu_post_test_multi(void)
 {
        int ret = 0;
        unsigned int i;
-       ulong src[26], dst[26];
+       ulong src[27], dst[27];
        int flag = disable_interrupts();
 
        ulong code[] = {