diff options
Diffstat (limited to 'drivers/tty/serial/8250/8250_port.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_port.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index 6a3c2ead0f17..dfdd2db95cb3 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -600,7 +600,7 @@ EXPORT_SYMBOL_GPL(serial8250_rpm_put); static int serial8250_em485_init(struct uart_8250_port *p) { if (p->em485) - return 0; + goto deassert_rts; p->em485 = kmalloc(sizeof(struct uart_8250_em485), GFP_ATOMIC); if (!p->em485) @@ -616,7 +616,9 @@ static int serial8250_em485_init(struct uart_8250_port *p) p->em485->active_timer = NULL; p->em485->tx_stopped = true; - p->rs485_stop_tx(p); +deassert_rts: + if (p->em485->tx_stopped) + p->rs485_stop_tx(p); return 0; } @@ -2048,6 +2050,9 @@ EXPORT_SYMBOL_GPL(serial8250_do_set_mctrl); static void serial8250_set_mctrl(struct uart_port *port, unsigned int mctrl) { + if (port->rs485.flags & SER_RS485_ENABLED) + return; + if (port->set_mctrl) port->set_mctrl(port, mctrl); else @@ -3192,9 +3197,6 @@ static void serial8250_config_port(struct uart_port *port, int flags) if (flags & UART_CONFIG_TYPE) autoconfig(up); - if (port->rs485.flags & SER_RS485_ENABLED) - uart_rs485_config(port); - /* if access method is AU, it is a 16550 with a quirk */ if (port->type == PORT_16550A && port->iotype == UPIO_AU) up->bugs |= UART_BUG_NOMSR; |