/* Check whether the pointed buffer are all 0xff (blank). */
static int blank_check(u8 *buf, int len)
/* Check whether the pointed buffer are all 0xff (blank). */
static int blank_check(u8 *buf, int len)
{
	int i;
	for (i = 0; i < len; i++)
		if (buf[i] != 0xFF)
			return 0;
	return 1;
}