From: Johan Hovold <johan@xxxxxxxxxx>
This patch has been added to the 3.12 stable tree. If you have any
objections, please let us know.
===============
commit f09d1886a41e9063b43da493ef0e845ac8afd2fa upstream.
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.
Fixes: f7a33e608d9a ("USB: serial: add quatech2 usb to serial driver")
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/usb/serial/quatech2.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/drivers/usb/serial/quatech2.c b/drivers/usb/serial/quatech2.c
index 58ab9e52a938..d0ee758dff0b 100644
--- a/drivers/usb/serial/quatech2.c
+++ b/drivers/usb/serial/quatech2.c
@@ -409,16 +409,12 @@ 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
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