Patch "USB: serial: ch341: fix open and resume after B0" has been added to the 4.4-stable tree

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 the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:

     usb-serial-ch341-fix-open-and-resume-after-b0.patch

and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Johan Hovold <[email protected]>
Date: Fri, 6 Jan 2017 19:15:11 +0100
Subject: USB: serial: ch341: fix open and resume after B0

From: Johan Hovold <[email protected]>

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.

---
 drivers/usb/serial/ch341.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

@@ -361,12 +361,11 @@ static void ch341_set_termios(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);

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/usb-serial-ch341-fix-control-message-error-handling.patch queue-4.4/usb-serial-ch341-fix-open-and-resume-after-b0.patch queue-4.4/usb-serial-ch341-fix-open-error-handling.patch queue-4.4/usb-serial-ch341-fix-initial-modem-control-state.patch queue-4.4/usb-serial-kl5kusb105-fix-line-state-error-handling.patch queue-4.4/usb-serial-ch341-fix-resume-after-reset.patch