+ while (bytes_available < needed_bytes) {
+ struct ivtv_buffer *buf = list_entry(steal->list.prev, struct ivtv_buffer, list);
+ u16 dma_xfer_cnt = buf->dma_xfer_cnt;
+
+ /* move buffers from the tail of the 'steal' queue to the tail of the
+ 'from' queue. Always copy all the buffers with the same dma_xfer_cnt
+ value, this ensures that you do not end up with partial frame data
+ if one frame is stored in multiple buffers. */
+ while (dma_xfer_cnt == buf->dma_xfer_cnt) {
+ list_move_tail(steal->list.prev, &from->list);
+ rc++;
+ steal->buffers--;
+ steal->length -= s->buf_size;
+ steal->bytesused -= buf->bytesused - buf->readpos;
+ buf->bytesused = buf->readpos = buf->b_flags = buf->dma_xfer_cnt = 0;
+ from->buffers++;
+ from->length += s->buf_size;
+ bytes_available += s->buf_size;
+ if (list_empty(&steal->list))
+ break;
+ buf = list_entry(steal->list.prev, struct ivtv_buffer, list);
+ }
+ }