According to tty_ioctl(4) (from man-pages 4.04) the rng member only counts 0->1 transitions. For the other signals (DSR, CD, CTS) both edges are supposed to be counted. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx> --- drivers/tty/serial/imx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index fcd48fd78bf5..1bf7b86acf66 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -884,7 +884,7 @@ static void imx_mctrl_check(struct imx_port *sport) sport->old_status = status; - if (changed & TIOCM_RI) + if (changed & TIOCM_RI && status & TIOCM_RI) sport->port.icount.rng++; if (changed & TIOCM_DSR) sport->port.icount.dsr++; -- 2.7.0 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
