diff options
| author | Johan Hovold <johan@kernel.org> | 2017-01-06 19:15:11 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-19 20:18:02 +0100 |
| commit | 0556a65e8b7d562ad99f10f36a59f7c87af0ca55 (patch) | |
| tree | 1e895cc76da64fb9216f07a5b4af29a1da1f8255 | |
| parent | 3ed1f6da3a179cde1ccb3d72fe8a0f1d169f9800 (diff) | |
USB: serial: ch341: fix open and resume after B0
commit a20047f36e2f6a1eea4f1fd261aaa55882369868 upstream.
The private baud_rate variable is used to configure the port at open and
reset-resume and must never be set to (and left at) zero or reset-resume
and all further open attempts will fail.
Fixes: aa91def41a7b ("USB: ch341: set tty baud speed according to tty struct")
Fixes: 664d5df92e88 ("USB: usb-serial ch341: support for DTR/RTS/CTS")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/serial/ch341.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c index 517671522fe8..22b2c464b468 100644 --- a/drivers/usb/serial/ch341.c +++ b/drivers/usb/serial/ch341.c @@ -361,12 +361,11 @@ static void ch341_set_termios(struct tty_struct *tty, baud_rate = tty_get_baud_rate(tty); - priv->baud_rate = baud_rate; - if (baud_rate) { spin_lock_irqsave(&priv->lock, flags); priv->line_control |= (CH341_BIT_DTR | CH341_BIT_RTS); spin_unlock_irqrestore(&priv->lock, flags); + priv->baud_rate = baud_rate; ch341_set_baudrate(port->serial->dev, priv); } else { spin_lock_irqsave(&priv->lock, flags); |