From 88c38044c12b09ad8b4b82b61133e66e879325ba Mon Sep 17 00:00:00 2001 From: Sergey Organov Date: Wed, 28 Aug 2019 21:37:52 +0300 Subject: [PATCH] serial: imx: do not stop Rx/Tx on termios change imx_set_termios(): stopping receiver and transmitter does harm when something that doesn't touch transmission format/rate changes, such as RTS/CTS handshake. OTOH, it does no good on baud rate or format change, as synchronization on upper-level protocols is still required to do it right. Therefore, just stop doing it. Signed-off-by: Sergey Organov Link: https://lore.kernel.org/r/1567017475-11919-3-git-send-email-sorganov@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 47b6156f5b2c..fa723a9a9c8c 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -1652,9 +1652,6 @@ imx_uart_set_termios(struct uart_port *port, struct ktermios *termios, UCR1); imx_uart_writel(sport, old_ucr2 & ~UCR2_ATEN, UCR2); - /* then, disable everything */ - imx_uart_writel(sport, old_ucr2 & ~(UCR2_TXEN | UCR2_RXEN | UCR2_ATEN), UCR2); - /* custom-baudrate handling */ div = sport->port.uartclk / (baud * 16); if (baud == 38400 && quot != div) -- 2.20.1