From mboxrd@z Thu Jan 1 00:00:00 1970 From: Giulio Benetti Subject: [PATCH 2/4] serial: 8250: Copy mctrl when register port. Date: Wed, 6 Jun 2018 11:49:37 +0200 Message-ID: <20180606094942.71190-1-giulio.benetti@micronovasrl.com> References: Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org Cc: matwey.kornilov@gmail.com, Giulio Benetti , Greg Kroah-Hartman , Jiri Slaby , Andy Shevchenko , Matthias Brugger , Kees Cook , Allen Pais , Sean Young , "open list:SERIAL DRIVERS" , open list List-Id: linux-serial@vger.kernel.org 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 --- 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; -- 2.17.1