patch "USB: serial: ch341: fix open and resume after B0" added to usb-linus

This is a note to let you know that I've just added the patch titled

USB: serial: ch341: fix open and resume after B0

to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From: Johan Hovold <[email protected]>
Date: Fri, 6 Jan 2017 19:15:11 +0100
Subject: 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.

struct")

---
 drivers/usb/serial/ch341.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

index d133e72fe888..6279df905c14 100644
@@ -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);

2.11.0