patch "USB: serial: quatech2: fix sleep-while-atomic in close" added to usb-linus

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

USB: serial: quatech2: fix sleep-while-atomic in close

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: Tue, 3 Jan 2017 16:40:01 +0100
Subject: USB: serial: quatech2: fix sleep-while-atomic in close

The write URB was being killed using the synchronous interface while holding a spin lock in close().

Simply drop the lock and busy-flag update, something which would have been taken care of by the completion handler if the URB was in flight.

---
 drivers/usb/serial/quatech2.c | 4 ----
 1 file changed, 4 deletions(-)

index 659cb8606bd9..5709cc93b083 100644
@@ -408,16 +408,12 @@ static void qt2_close(struct usb_serial_port *port)
 {
 	struct usb_serial *serial;
 	struct qt2_port_private *port_priv;
-	unsigned long flags;
 	int i;
 
 	serial = port->serial;
 	port_priv = usb_get_serial_port_data(port);
 
-	spin_lock_irqsave(&port_priv->urb_lock, flags);
 	usb_kill_urb(port_priv->write_urb);
-	port_priv->urb_in_use = false;
-	spin_unlock_irqrestore(&port_priv->urb_lock, flags);
 
 	/* flush the port transmit buffer */
 	i = usb_control_msg(serial->dev,

2.11.0