diff options
Diffstat (limited to 'drivers/tty/serial/serial_core.c')
| -rw-r--r-- | drivers/tty/serial/serial_core.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 61e3dd0222af..dc40c4155356 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -162,7 +162,7 @@ static void uart_port_dtr_rts(struct uart_port *uport, int raise) int RTS_after_send = !!(uport->rs485.flags & SER_RS485_RTS_AFTER_SEND); if (raise) { - if (rs485_on && !RTS_after_send) { + if (rs485_on && RTS_after_send) { uart_set_mctrl(uport, TIOCM_DTR); uart_clear_mctrl(uport, TIOCM_RTS); } else { @@ -171,7 +171,7 @@ static void uart_port_dtr_rts(struct uart_port *uport, int raise) } else { unsigned int clear = TIOCM_DTR; - clear |= (!rs485_on || !RTS_after_send) ? TIOCM_RTS : 0; + clear |= (!rs485_on || RTS_after_send) ? TIOCM_RTS : 0; uart_clear_mctrl(uport, clear); } } @@ -1701,17 +1701,13 @@ static void uart_port_shutdown(struct tty_port *port) */ wake_up_interruptible(&port->delta_msr_wait); - /* - * Free the IRQ and disable the port. - */ - if (uport) + if (uport) { + /* Free the IRQ and disable the port. */ uport->ops->shutdown(uport); - /* - * Ensure that the IRQ handler isn't running on another CPU. - */ - if (uport) + /* Ensure that the IRQ handler isn't running on another CPU. */ synchronize_irq(uport->irq); + } } static int uart_carrier_raised(struct tty_port *port) @@ -2393,7 +2389,8 @@ uart_configure_port(struct uart_driver *drv, struct uart_state *state, * We probably don't need a spinlock around this, but */ spin_lock_irqsave(&port->lock, flags); - port->ops->set_mctrl(port, port->mctrl & TIOCM_DTR); + port->mctrl &= TIOCM_DTR; + port->ops->set_mctrl(port, port->mctrl); spin_unlock_irqrestore(&port->lock, flags); /* |