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authorJohan Hovold <johan@kernel.org>2017-01-06 19:15:11 +0100
committerJohan Hovold <johan@kernel.org>2017-01-09 14:55:37 +0100
commita20047f36e2f6a1eea4f1fd261aaa55882369868 (patch)
treecde5e83376e707d2a8952bf64584340efda3c8a0 /drivers/usb
parent4e2da44691cffbfffb1535f478d19bc2dca3e62b (diff)
downloadlinux-a20047f36e2f6a1eea4f1fd261aaa55882369868.tar.bz2
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')
-rw-r--r--drivers/usb/serial/ch341.c4
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);