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| author |   Johan Hovold <johan@kernel.org> | 2017-01-06 19:15:11 +0100 |
|---|---|---|
| committer | Johan Hovold <johan@kernel.org> | 2017-01-09 14:55:37 +0100 |
| commit | a20047f36e2f6a1eea4f1fd261aaa55882369868 (patch) | |
| tree | cde5e83376e707d2a8952bf64584340efda3c8a0 /drivers/usb/serial/ch341.c | |
| parent | USB: serial: ch341: fix initial modem-control state (diff) | |
| download | linux-dev-a20047f36e2f6a1eea4f1fd261aaa55882369868.tar.xz linux-dev-a20047f36e2f6a1eea4f1fd261aaa55882369868.zip | |
USB: serial: ch341: fix open and resume after B0
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")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'drivers/usb/serial/ch341.c')
| -rw-r--r-- | drivers/usb/serial/ch341.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c index d133e72fe888..6279df905c14 100644 --- a/drivers/usb/serial/ch341.c +++ b/drivers/usb/serial/ch341.c @@ -355,7 +355,6 @@ static void ch341_set_termios(struct tty_struct *tty, baud_rate = tty_get_baud_rate(tty); - priv->baud_rate = baud_rate; ctrl = CH341_LCR_ENABLE_RX | CH341_LCR_ENABLE_TX; switch (C_CSIZE(tty)) { @@ -388,6 +387,9 @@ static void ch341_set_termios(struct tty_struct *tty, 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; + r = ch341_init_set_baudrate(port->serial->dev, priv, ctrl); if (r < 0 && old_termios) { priv->baud_rate = tty_termios_baud_rate(old_termios); |