diff options
| -rw-r--r-- | drivers/tty/serial/8250/8250_port.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index 73244806d701..d281aea061d6 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -676,10 +676,18 @@ int serial8250_em485_config(struct uart_port *port, struct serial_rs485 *rs485) { struct uart_8250_port *up = up_to_u8250p(port); + /* pick sane settings if the user hasn't */ + if (!!(rs485->flags & SER_RS485_RTS_ON_SEND) == + !!(rs485->flags & SER_RS485_RTS_AFTER_SEND)) { + rs485->flags |= SER_RS485_RTS_ON_SEND; + rs485->flags &= ~SER_RS485_RTS_AFTER_SEND; + } + /* clamp the delays to [0, 100ms] */ rs485->delay_rts_before_send = min(rs485->delay_rts_before_send, 100U); rs485->delay_rts_after_send = min(rs485->delay_rts_after_send, 100U); + memset(rs485->padding, 0, sizeof(rs485->padding)); port->rs485 = *rs485; /* |