static void rx_complete(struct usb_ep *ep, struct usb_request *req)
{
	struct printer_dev	*dev = ep->driver_data;
	int			status = req->status;
	unsigned long		flags;

	spin_lock_irqsave(&dev->lock, flags);

	list_del_init(&req->list);	/* Remode from Active List */

	switch (status) {

	/* normal completion */
	case 0:
		if (req->actual > 0) {
			list_add_tail(&req->list, &dev->rx_buffers);
			DBG(dev, "G_Printer : rx length %d\n", req->actual);
		} else {
			list_add(&req->list, &dev->rx_reqs);
		}
		break;

	/* software-driven interface shutdown */
	case -ECONNRESET:		/* unlink */
	case -ESHUTDOWN:		/* disconnect etc */
		VDBG(dev, "rx shutdown, code %d\n", status);
		list_add(&req->list, &dev->rx_reqs);
		break;

	/* for hardware automagic (such as pxa) */
	case -ECONNABORTED:		/* endpoint reset */
		DBG(dev, "rx %s reset\n", ep->name);
		list_add(&req->list, &dev->rx_reqs);
		break;

	/* data overrun */
	case -EOVERFLOW:
		fallthrough;

	default:
		DBG(dev, "rx status %d\n", status);
		list_add(&req->list, &dev->rx_reqs);
		break;
	}

	wake_up_interruptible(&dev->rx_wait);
	spin_unlock_irqrestore(&dev->lock, flags);
}
static void rx_complete(struct usb_ep *ep, struct usb_request *req)
{
	struct printer_dev	*dev = ep->driver_data;
	int			status = req->status;
	unsigned long		flags;

	spin_lock_irqsave(&dev->lock, flags);

	list_del_init(&req->list);	 

	switch (status) {

	 
	case 0:
		if (req->actual > 0) {
			list_add_tail(&req->list, &dev->rx_buffers);
			DBG(dev, "G_Printer : rx length %d\n", req->actual);
		} else {
			list_add(&req->list, &dev->rx_reqs);
		}
		break;

	 
	case -ECONNRESET:		 
	case -ESHUTDOWN:		 
		VDBG(dev, "rx shutdown, code %d\n", status);
		list_add(&req->list, &dev->rx_reqs);
		break;

	 
	case -ECONNABORTED:		 
		DBG(dev, "rx %s reset\n", ep->name);
		list_add(&req->list, &dev->rx_reqs);
		break;

	 
	case -EOVERFLOW:
		fallthrough;

	default:
		DBG(dev, "rx status %d\n", status);
		list_add(&req->list, &dev->rx_reqs);
		break;
	}

	wake_up_interruptible(&dev->rx_wait);
	spin_unlock_irqrestore(&dev->lock, flags);
}