CX231XX_ISO_NUM_AUDIO_PACKETS
sb_size = CX231XX_ISO_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size;
urb = usb_alloc_urb(CX231XX_ISO_NUM_AUDIO_PACKETS, GFP_ATOMIC);
urb->number_of_packets = CX231XX_ISO_NUM_AUDIO_PACKETS;
for (j = k = 0; j < CX231XX_ISO_NUM_AUDIO_PACKETS;