[SCSI] ibmmca: fix buffer overflow

Allows i == IM_MAX_HOSTS, which is out of range.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

drivers/scsi/ibmmca.c

@@ -2336,7 +2336,7 @@ static int option_setup(char *str)
 	char *cur = str;
 	int i = 1;
 
-	while (cur && isdigit(*cur) && i <= IM_MAX_HOSTS) {
+	while (cur && isdigit(*cur) && i < IM_MAX_HOSTS) {
 		ints[i++] = simple_strtoul(cur, NULL, 0);
 		if ((cur = strchr(cur, ',')) != NULL)
 			cur++;