USB: metro-usb: fix io after disconnect
Make sure no control urb is submitted during close after a disconnect by checking the disconnected flag. Cc: <stable@vger.kernel.org> Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -179,16 +179,13 @@ static void metrousb_cleanup(struct usb_serial_port *port)
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{
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dev_dbg(&port->dev, "%s\n", __func__);
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if (port->serial->dev) {
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/* Shutdown any interrupt in urbs. */
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if (port->interrupt_in_urb) {
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usb_unlink_urb(port->interrupt_in_urb);
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usb_kill_urb(port->interrupt_in_urb);
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}
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usb_unlink_urb(port->interrupt_in_urb);
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usb_kill_urb(port->interrupt_in_urb);
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/* Send deactivate cmd to device */
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mutex_lock(&port->serial->disc_mutex);
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if (!port->serial->disconnected)
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metrousb_send_unidirectional_cmd(UNI_CMD_CLOSE, port);
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}
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mutex_unlock(&port->serial->disc_mutex);
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}
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static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port)
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