func: static void megasas_unmap_frame(MegasasState *s, MegasasCmd *cmd)
  
  {
  
      PCIDevice *p = PCI_DEVICE(s);
  
  
  
      pci_dma_unmap(p, cmd->frame, cmd->pa_size, 0, 0);
  
      cmd->frame = NULL;
  
      cmd->pa = 0;
  
      clear_bit(cmd->index, s->frame_map);
  
  }
  