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| author | Sergey Organov <sorganov@gmail.com> | 2019-08-28 21:37:52 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-04 13:43:55 +0300 |
| commit | 88c38044c12b09ad8b4b82b61133e66e879325ba (patch) | |
| tree | bfb15097c2a02d1e36d3d776c7c2d8e078c797d9 | |
| parent | 2eda5345e4ef61b35101b4fef58417a41d8d53fd (diff) | |
| download | linux-88c38044c12b09ad8b4b82b61133e66e879325ba.tar.xz | |
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 <sorganov@gmail.com>
Link: https://lore.kernel.org/r/1567017475-11919-3-git-send-email-sorganov@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/imx.c | 3 |
1 files changed, 0 insertions, 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) |