From: Johan Hovold johan@kernel.org
commit ea7ada4de2f7406150dd35ecd0302842587a464e upstream.
The XR21V141X does not have a 5- or 6-bit mode, but the current implementation failed to properly restore the old setting when CS5 or CS6 was requested. Instead an invalid request would be sent to the device.
Fixes: c2d405aa86b4 ("USB: serial: add MaxLinear/Exar USB to Serial driver") Reviewed-by: Manivannan Sadhasivam mani@kernel.org Cc: stable@vger.kernel.org # 5.12 Signed-off-by: Johan Hovold johan@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/serial/xr_serial.c | 5 +++++ 1 file changed, 5 insertions(+)
--- a/drivers/usb/serial/xr_serial.c +++ b/drivers/usb/serial/xr_serial.c @@ -468,6 +468,11 @@ static void xr_set_termios(struct tty_st if (old_termios) termios->c_cflag |= old_termios->c_cflag & CSIZE; else + termios->c_cflag |= CS8; + + if (C_CSIZE(tty) == CS7) + bits |= XR21V141X_UART_DATA_7; + else bits |= XR21V141X_UART_DATA_8; break; case CS7: