static int setup_channel_list(struct comedi_device *dev,
                              struct comedi_subdevice *s, int n_chan,
-                             unsigned int *chanlist, int rot, int frontadd,
-                             int backadd, int usedma)
+                             unsigned int *chanlist, int frontadd,
+                             int backadd)
 {
        struct pci9118_private *devpriv = dev->private;
        unsigned int scanquad, gain, ssh = 0x00;
        int i;
 
-       if (usedma == 1) {
-               rot = 8;
-               usedma = 0;
-       }
-
        /* gods know why this sequence! */
        outl(2, dev->iobase + PCI9118_AI_AUTOSCAN_MODE_REG);
        outl(0, dev->iobase + PCI9118_AI_AUTOSCAN_MODE_REG);
        pci9118_ai_set_range_aref(dev, s, cmd->chanlist[0]);
 
        if (!setup_channel_list(dev, s, cmd->chanlist_len,
-                               cmd->chanlist, 0, devpriv->ai_add_front,
-                               devpriv->ai_add_back, devpriv->usedma))
+                               cmd->chanlist, devpriv->ai_add_front,
+                               devpriv->ai_add_back))
                return -EINVAL;
 
        /* compute timers settings */
        devpriv->ai_cfg = PCI9118_AI_CFG_PDTRG | PCI9118_AI_CFG_PETRG;
        outl(devpriv->ai_cfg, dev->iobase + PCI9118_AI_CFG_REG);
 
-       if (!setup_channel_list(dev, s, 1, &insn->chanspec, 0, 0, 0, 0))
+       if (!setup_channel_list(dev, s, 1, &insn->chanspec, 0, 0))
                return -EINVAL;
 
        pci9118_ai_reset_fifo(dev);