19 	unsigned char	buf[32], *bp;  in do_read()  local
25 	else if (len > sizeof(buf))  in do_read()
26 		len = sizeof(buf);  in do_read()
27 	memset(buf, 0, sizeof buf);  in do_read()
29 	status = read(fd, buf, len);  in do_read()
40 		buf[0], buf[1]);  in do_read()
42 	bp = buf + 2;  in do_read()
51 	unsigned char		buf[32], *bp;  in do_msg()  local
55 	memset(buf, 0, sizeof buf);  in do_msg()
57 	if (len > sizeof buf)  in do_msg()
58 		len = sizeof buf;  in do_msg()
60 	buf[0] = 0xaa;  in do_msg()
61 	xfer[0].tx_buf = (unsigned long)buf;  in do_msg()
64 	xfer[1].rx_buf = (unsigned long) buf;  in do_msg()
74 	for (bp = buf; len; len--)  in do_msg()