The comment in imx_uart_shutdown() says to disable the break condition, but it doesn't actually do that, here fix this by disabling UCR1_SNDBRK when closing the uart port like other uart drivers do. Signed-off-by: Sherry Sun <sherry.sun@xxxxxxx> --- drivers/tty/serial/imx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 757825edb0cd..74c9e68fc3bd 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -1564,7 +1564,8 @@ static void imx_uart_shutdown(struct uart_port *port) spin_lock_irqsave(&sport->port.lock, flags); ucr1 = imx_uart_readl(sport, UCR1); - ucr1 &= ~(UCR1_TRDYEN | UCR1_RRDYEN | UCR1_RTSDEN | UCR1_RXDMAEN | UCR1_ATDMAEN); + ucr1 &= ~(UCR1_TRDYEN | UCR1_RRDYEN | UCR1_RTSDEN | UCR1_RXDMAEN | + UCR1_ATDMAEN | UCR1_SNDBRK); /* See SER_RS485_ENABLED/UTS_LOOP comment in imx_uart_probe() */ if (port->rs485.flags & SER_RS485_ENABLED && port->rs485.flags & SER_RS485_RTS_ON_SEND && -- 2.17.1
