staging: comedi: adv_pci1710: remove 'ai_data_len' from private data

This member of the private data is just a copy of the s->async->prealloc_bufsz.
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/adv_pci1710.c b/drivers/staging/comedi/drivers/adv_pci1710.c
index 8fcc67a..9ce0535 100644 (file)
--- a/drivers/staging/comedi/drivers/adv_pci1710.c
+++ b/drivers/staging/comedi/drivers/adv_pci1710.c
@@ -314,7 +314,6 @@ struct pci1710_private {
        unsigned char act_chanlist_len; /*  len of scanlist */
        unsigned char act_chanlist_pos; /*  actual position in MUX list */
        unsigned char da_ranges;        /*  copy of D/A outpit range register */
-       unsigned int ai_data_len;       /*  len of data buffer */
        unsigned short ao_data[4];      /*  data output buffer */
        unsigned int cnt0_write_wait;   /* after a write, wait for update of the
                                         * internal state */
@@ -888,8 +887,8 @@ static void interrupt_pci1710_half_fifo(void *d)
        }
 
        samplesinbuf = this_board->fifo_half_size;
-       if (samplesinbuf * sizeof(short) >= devpriv->ai_data_len) {
-               m = devpriv->ai_data_len / sizeof(short);
+       if (samplesinbuf * sizeof(short) >= s->async->prealloc_bufsz) {
+               m = s->async->prealloc_bufsz / sizeof(short);
                if (move_block_from_fifo(dev, s, m, 0))
                        return;
                samplesinbuf -= m;
@@ -1114,11 +1113,8 @@ static int pci171x_ai_cmdtest(struct comedi_device *dev,
 */
 static int pci171x_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 {
-       struct pci1710_private *devpriv = dev->private;
        struct comedi_cmd *cmd = &s->async->cmd;
 
-       devpriv->ai_data_len = s->async->prealloc_bufsz;
-
        if (cmd->scan_begin_src == TRIG_FOLLOW) {       /*  mode 1, 2, 3 */
                if (cmd->convert_src == TRIG_TIMER) {   /*  mode 1 and 2 */
                        return pci171x_ai_docmd_and_mode(cmd->start_src ==