Fix incorrect use of getenv() before relocation

A large number of boards incorrectly used getenv() in their board init
code running before relocation.  In some cases this caused U-Boot to
hang when certain environment variables grew too long.
Fix the code to use getenv_r().

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Stefan Roese <sr@denx.de>
Cc: The LEOX team <team@leox.org>
Cc: Michael Schwingen <michael@schwingen.org>
Cc: Georg Schardt <schardt@team-ctech.de>
Cc: Werner Pfister <Pfister_Werner@intercontrol.de>
Cc: Dirk Eibach <eibach@gdsys.de>
Cc: Peter De Schrijver <p2@mind.be>
Cc: John Zhan <zhanz@sinovee.com>
Cc: Rishi Bhattacharya <rishi@ti.com>
Cc: Peter Tyser <ptyser@xes-inc.com>

1 files changed, 7 insertions, 11 deletions

diff --git a/board/ml2/ml2.c b/board/ml2/ml2.c
index 981e1decda..319dca09db 100644
--- a/board/ml2/ml2.c
+++ b/board/ml2/ml2.c
@@ -30,23 +30,19 @@ int board_early_init_f (void)
 
 int checkboard (void)
 {
-	char *s = getenv ("serial#");
-	char *e;
+	char buf[64];
+	int i;
+	int l = getenv_f("serial#", buf, sizeof(buf));
 
-	if (!s || strncmp (s, "ML2", 9)) {
+	if (l < 0 || strncmp(buf, "ML2", 9)) {
 		printf ("### No HW ID - assuming ML2");
 	} else {
-		for (e = s; *e; ++e) {
-			if (*e == ' ')
+		for (i = 0; i < l; i++) {
+			if (buf[i] == ' ')
 				break;
-		}
-
-		for (; s < e; ++s) {
-			putc (*s);
+			putc(buf[i]);
 		}
 	}
-
-
 	putc ('\n');
 
 	return (0);