drivers/usb/usb-skeleton.c

52 	struct urb		*bulk_in_urb;		/* the urb to read data with */
160 static void skel_read_bulk_callback(struct urb *urb)
165 	dev = urb->context;
169 	if (urb->status) {
170 		if (!(urb->status == -ENOENT ||
171 		    urb->status == -ECONNRESET ||
172 		    urb->status == -ESHUTDOWN))
175 				__func__, urb->status);
177 		dev->errors = urb->status;
179 		dev->bulk_in_filled = urb->actual_length;
205 	/* submit bulk in urb, which means no data to deliver */
213 			"%s - failed submitting read urb, error %d\n",
332 static void skel_write_bulk_callback(struct urb *urb)
337 	dev = urb->context;
340 	if (urb->status) {
341 		if (!(urb->status == -ENOENT ||
342 		    urb->status == -ECONNRESET ||
343 		    urb->status == -ESHUTDOWN))
346 				__func__, urb->status);
349 		dev->errors = urb->status;
354 	usb_free_coherent(urb->dev, urb->transfer_buffer_length,
355 			  urb->transfer_buffer, urb->transfer_dma);
364 	struct urb *urb = NULL;
402 	/* create a urb, and a buffer for it, and copy the data to the urb */
403 	urb = usb_alloc_urb(0, GFP_KERNEL);
404 	if (!urb) {
410 				 &urb->transfer_dma);
429 	/* initialize the urb properly */
430 	usb_fill_bulk_urb(urb, dev->udev,
433 	urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
434 	usb_anchor_urb(urb, &dev->submitted);
437 	retval = usb_submit_urb(urb, GFP_KERNEL);
441 			"%s - failed submitting write urb, error %d\n",
447 	 * release our reference to this urb, the USB core will eventually free
450 	usb_free_urb(urb);
456 	usb_unanchor_urb(urb);
458 	if (urb) {
459 		usb_free_coherent(dev->udev, writesize, buf, urb->transfer_dma);
460 		usb_free_urb(urb);