staging: comedi: pcl812: remove 'ai_chanlist' from private data

This member of the private data is just a copy of the cmd->chanlist. Use
that instead.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/pcl812.c b/drivers/staging/comedi/drivers/pcl812.c
index d0708f8326dfad337d9ae18c3166912dea3c99e7..8728a90e543b2571b350f1284d0aa3e3e34401ab 100644 (file)
--- a/drivers/staging/comedi/drivers/pcl812.c
+++ b/drivers/staging/comedi/drivers/pcl812.c
@@ -517,7 +517,6 @@ struct pcl812_private {
        unsigned char ai_dma;   /*  =1 we use DMA */
        unsigned int ai_poll_ptr;       /*  how many sampes transfer poll */
        unsigned int ai_act_scan;       /*  how many scans we finished */
-       unsigned int ai_chanlist[MAX_CHANLIST_LEN];     /*  our copy of channel/range list */
        unsigned int ai_data_len;       /*  len of data buffer */
        unsigned int dmapages;
        unsigned int hwdmasize;
@@ -769,15 +768,13 @@ static int pcl812_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 
        pcl812_start_pacer(dev, false);
 
-       memcpy(devpriv->ai_chanlist, cmd->chanlist,
-              sizeof(unsigned int) * cmd->scan_end_arg);
        /*  select first channel and range */
-       setup_range_channel(dev, s, devpriv->ai_chanlist[0], 1);
+       setup_range_channel(dev, s, cmd->chanlist[0], 1);
 
        if (devpriv->dma) {     /*  check if we can use DMA transfer */
                devpriv->ai_dma = 1;
                for (i = 1; i < cmd->chanlist_len; i++)
-                       if (devpriv->ai_chanlist[0] != devpriv->ai_chanlist[i]) {
+                       if (cmd->chanlist[0] != cmd->chanlist[i]) {
                                /*  we cann't use DMA :-( */
                                devpriv->ai_dma = 0;
                                break;
@@ -921,9 +918,8 @@ static irqreturn_t interrupt_pcl812_ai_int(int irq, void *d)
        next_chan = s->async->cur_chan + 1;
        if (next_chan >= cmd->chanlist_len)
                next_chan = 0;
-       if (devpriv->ai_chanlist[s->async->cur_chan] !=
-                       devpriv->ai_chanlist[next_chan])
-               setup_range_channel(dev, s, devpriv->ai_chanlist[next_chan], 0);
+       if (cmd->chanlist[s->async->cur_chan] != cmd->chanlist[next_chan])
+               setup_range_channel(dev, s, cmd->chanlist[next_chan], 0);
 
        outb(0, dev->iobase + PCL812_CLRINT);   /* clear INT request */