USB: mct_u232: fix broken close

commit 5260e458f5eff269a43e4f1e9c47186c57b88ddb upstream.

Make sure generic close is called at close.

The driver relies on the generic write implementation but did not call
generic close.

Note that the call to kill the read urb is not redundant, as mct_u232
uses an interrupt urb from the second port as the read urb and that
generic close therefore fails to kill it.

Compile-only tested.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c
index 6801f4e10318af96f614021c1ba3f20c2cb90dd0..c088250555ba0a798e8d4c737ef69e6525fe1508 100644 (file)
--- a/drivers/usb/serial/mct_u232.c
+++ b/drivers/usb/serial/mct_u232.c
@@ -524,12 +524,14 @@ static void mct_u232_dtr_rts(struct usb_serial_port *port, int on)
 
 static void mct_u232_close(struct usb_serial_port *port)
 {
-       if (port->serial->dev) {
-               /* shutdown our urbs */
-               usb_kill_urb(port->write_urb);
-               usb_kill_urb(port->read_urb);
-               usb_kill_urb(port->interrupt_in_urb);
-       }
+       /*
+        * Must kill the read urb as it is actually an interrupt urb, which
+        * generic close thus fails to kill.
+        */
+       usb_kill_urb(port->read_urb);
+       usb_kill_urb(port->interrupt_in_urb);
+
+       usb_serial_generic_close(port);
 } /* mct_u232_close */