Messages in this thread Patch in this message | | | From | Wolfram Sang <> | Subject | [PATCH RESEND 5/8] serial: 8250: reject delaying RTS with RS485 | Date | Fri, 9 Dec 2011 18:07:17 +0100 |
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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@pengutronix.de> --- 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); -- 1.7.7.3
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