[PATCH 3.2 096/199] USB: serial: ch341: fix initial modem-control state

From: Ben Hutchings
Date: Fri Mar 10 2017 - 07:53:26 EST

3.2.87-rc1 review patch. If anyone has any objections, please let me know.


From: Johan Hovold <johan@xxxxxxxxxx>

commit 4e2da44691cffbfffb1535f478d19bc2dca3e62b upstream.

DTR and RTS will be asserted by the tty-layer when the port is opened
and deasserted on close (if HUPCL is set). Make sure the initial state
is not-asserted before the port is first opened as well.

Fixes: 664d5df92e88 ("USB: usb-serial ch341: support for DTR/RTS/CTS")
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
drivers/usb/serial/ch341.c | 1 -
1 file changed, 1 deletion(-)

--- a/drivers/usb/serial/ch341.c
+++ b/drivers/usb/serial/ch341.c
@@ -270,7 +270,6 @@ static int ch341_attach(struct usb_seria

priv->baud_rate = DEFAULT_BAUD_RATE;
- priv->line_control = CH341_BIT_RTS | CH341_BIT_DTR;

r = ch341_configure(serial->dev, priv);
if (r < 0)