usb/stk1160/stk1160-video.c

218  * Controls the isoc copy of each urb packet
220 static void stk1160_process_isoc(struct stk1160 *dev, struct urb *urb)
230 	if (urb->status < 0) {
232 		print_err_status(dev, -1, urb->status);
236 	for (i = 0; i < urb->number_of_packets; i++) {
237 		status = urb->iso_frame_desc[i].status;
244 		p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
245 		len = urb->iso_frame_desc[i].actual_length;
298 static void stk1160_isoc_irq(struct urb *urb)
301 	struct stk1160_urb *stk_urb = urb->context;
305 	switch (urb->status) {
314 		stk1160_err("urb error! status %d\n", urb->status);
319 				     urb->transfer_buffer_length);
322 	stk1160_process_isoc(dev, urb);
324 	/* Reset urb buffers */
325 	for (i = 0; i < urb->number_of_packets; i++) {
326 		urb->iso_frame_desc[i].status = 0;
327 		urb->iso_frame_desc[i].actual_length = 0;
331 	rc = usb_submit_urb(urb, GFP_ATOMIC);
333 		stk1160_err("urb re-submit failed (%d)\n", rc);
360 		usb_kill_urb(dev->isoc_ctl.urb_ctl[i].urb);
371 	dma_free_noncontiguous(dma_dev, stk_urb->urb->transfer_buffer_length,
373 	usb_free_urb(stk_urb->urb);
377 	stk_urb->urb = NULL;
383  * Releases urb and transfer buffers
384  * Obviusly, associated urb must be killed before releasing it.
390 	stk1160_dbg("freeing %d urb buffers...\n", num_bufs);
397 	stk1160_dbg("all urb buffers freed\n");
415 	stk_urb->urb = usb_alloc_urb(max_packets, GFP_KERNEL);
416 	if (!stk_urb->urb)
440 	usb_free_urb(stk_urb->urb);
441 	stk_urb->urb = NULL;
450 	struct urb *urb;
479 		urb = dev->isoc_ctl.urb_ctl[i].urb;
481 		if (!urb) {
492 		urb->dev = dev->udev;
493 		urb->pipe = usb_rcvisocpipe(dev->udev, STK1160_EP_VIDEO);
494 		urb->transfer_buffer = dev->isoc_ctl.urb_ctl[i].transfer_buffer;
495 		urb->transfer_buffer_length = sb_size;
496 		urb->complete = stk1160_isoc_irq;
497 		urb->context = &dev->isoc_ctl.urb_ctl[i];
498 		urb->interval = 1;
499 		urb->start_frame = 0;
500 		urb->number_of_packets = max_packets;
501 		urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
502 		urb->transfer_dma = dev->isoc_ctl.urb_ctl[i].dma;
506 			urb->iso_frame_desc[j].offset = k;
507 			urb->iso_frame_desc[j].length =
523 	 * enough to work fine, so we just free the extra urb,