staging: comedi: pcl818: remove 'ai_scans' from private data

This member of the private data is just a copy of the cmd->stop_arg.

Refactor the code to follow the style of pcl812 and pcl816 drivers.

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/pcl818.c b/drivers/staging/comedi/drivers/pcl818.c
index d5709ed..eea48de 100644 (file)
--- a/drivers/staging/comedi/drivers/pcl818.c
+++ b/drivers/staging/comedi/drivers/pcl818.c
@@ -341,7 +341,6 @@ struct pcl818_private {
        unsigned int act_chanlist[16];  /*  MUX setting for actual AI operations */
        unsigned int act_chanlist_len;  /*  how long is actual MUX list */
        unsigned int act_chanlist_pos;  /*  actual position in MUX list */
-       unsigned int ai_scans;  /*  len of scanlist */
        unsigned int ai_n_chan; /*  how many channels is measured */
        unsigned int *ai_chanlist;      /*  actaul chanlist */
        unsigned int ai_flags;  /*  flaglist */
@@ -790,13 +789,14 @@ static void pcl818_ai_mode13dma_int(int mode, struct comedi_device *dev,
                                    struct comedi_subdevice *s)
 {
        struct pcl818_private *devpriv = dev->private;
+       struct comedi_cmd *cmd = &s->async->cmd;
        unsigned int flags;
        unsigned int bytes;
 
        disable_dma(devpriv->dma);      /*  disable dma */
        bytes = devpriv->hwdmasize[0];
        if (!devpriv->neverending_ai) {
-               bytes = devpriv->ai_n_chan * devpriv->ai_scans * sizeof(short); /*  how many */
+               bytes = devpriv->ai_n_chan * cmd->stop_arg * sizeof(short);     /*  how many */
                devpriv->dma_runs_to_end = bytes / devpriv->hwdmasize[0];       /*  how many DMA pages we must fiil */
                devpriv->last_dma_run = bytes % devpriv->hwdmasize[0];  /* on last dma transfer must be moved */
                devpriv->dma_runs_to_end--;
@@ -848,17 +848,13 @@ static int pcl818_ai_cmd_mode(int mode, struct comedi_device *dev,
 
        udelay(1);
 
-       devpriv->ai_act_scan = devpriv->ai_scans;
+       devpriv->ai_act_scan = cmd->stop_arg;
        devpriv->ai_act_chan = 0;
        devpriv->irq_blocked = 1;
        devpriv->irq_was_now_closed = 0;
-       devpriv->neverending_ai = 0;
        devpriv->act_chanlist_pos = 0;
        devpriv->dma_runs_to_end = 0;
 
-       if ((devpriv->ai_scans == 0) || (devpriv->ai_scans == -1))
-               devpriv->neverending_ai = 1;    /* well, user want neverending */
-
        if (mode == 1) {
                i8253_cascade_ns_to_timer(devpriv->i8253_osc_base,
                                          &divisor1, &divisor2,
@@ -1127,9 +1123,9 @@ static int ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
        devpriv->ai_timer2 = 0;
 
        if (cmd->stop_src == TRIG_COUNT)
-               devpriv->ai_scans = cmd->stop_arg;
+               devpriv->neverending_ai = 0;
        else
-               devpriv->ai_scans = 0;
+               devpriv->neverending_ai = 1;
 
        if (cmd->scan_begin_src == TRIG_FOLLOW) {       /*  mode 1, 3 */
                if (cmd->convert_src == TRIG_TIMER) {   /*  mode 1 */