There might be chips capable of doing this, but for now nothing is implemented, so reject usage of this feature. Signed-off-by: Wolfram Sang <w.sang@xxxxxxxxxxxxxx> --- drivers/tty/serial/8250.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c index 6a2f47f..28b3608 100644 --- a/drivers/tty/serial/8250.c +++ b/drivers/tty/serial/8250.c @@ -2735,6 +2735,9 @@ static int serial8250_ioctl_port(struct uart_port *port, sizeof(rs485ctrl))) return -EFAULT; + if (rs485ctrl.delay_rts_before_send || rs485ctrl.delay_rts_after_send) + return -EOPNOTSUPP; + spin_lock_irqsave(&up->port.lock, flags); lcr = serial_inp(up, UART_LCR); serial_outp(up, UART_LCR, UART_LCR_CONF_MODE_B); -- 1.7.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
