[PATCH 6/8] serial: 8250: Copy mctrl when register port.

From: Giulio Benetti
Date: Fri Jun 01 2018 - 08:41:41 EST


RS485 can modify mctrl on startup, especially when RTS_AFTER_SEND is on
TIOCM_RTS is set, then need to keep it set when registering port.

Copy mctrl to new port too.

Signed-off-by: Giulio Benetti <giulio.benetti@xxxxxxxxxxxxxxxx>
---
drivers/tty/serial/8250/8250_core.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index c8c2b260c681..c8e62fbd6570 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -993,6 +993,7 @@ int serial8250_register_8250_port(struct uart_8250_port *up)
uart->port.unthrottle = up->port.unthrottle;
uart->port.rs485_config = up->port.rs485_config;
uart->port.rs485 = up->port.rs485;
+ uart->port.mctrl = up->port.mctrl;
uart->dma = up->dma;
uart->em485 = up->em485;

--
2.17.0