FRAMES_PER_URB
for (frame = 0; frame < FRAMES_PER_URB; frame++) {
for (frame = 0; frame < FRAMES_PER_URB; frame++) {
urb->number_of_packets = FRAMES_PER_URB;
urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
kmalloc_array(BYTES_PER_FRAME, FRAMES_PER_URB,
for (frame = 0; frame < FRAMES_PER_URB; frame++) {
urbs[i]->transfer_buffer_length = FRAMES_PER_URB
urbs[i]->number_of_packets = FRAMES_PER_URB;