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

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This member of the private data is only used in the initial dma setup.
Refactor that code to not need it and remove the member.

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>
This commit is contained in:
H Hartley Sweeten 2014-03-04 11:29:30 -07:00 • committed by Greg Kroah-Hartman
parent ab72ef30da
commit b0b908549e
1 changed files with 3 additions and 5 deletions
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8
drivers/staging/comedi/drivers/pcl812.c
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@ -511,7 +511,6 @@ struct pcl812_private {
unsigned char mode_reg_int; /* there is stored INT number for some card */
unsigned int ai_poll_ptr; /* how many sampes transfer poll */
unsigned int ai_act_scan; /* how many scans we finished */
unsigned int ai_data_len; /* len of data buffer */
unsigned int dmapages;
unsigned int hwdmasize;
unsigned long dmabuf[2]; /* PTR to DMA buf */
@ -568,11 +567,11 @@ static void pcl812_ai_setup_dma(struct comedi_device *dev,
} else {
devpriv->dmabytestomove[0] = devpriv->hwdmasize;
devpriv->dmabytestomove[1] = devpriv->hwdmasize;
if (devpriv->ai_data_len < devpriv->hwdmasize) {
if (s->async->prealloc_bufsz < devpriv->hwdmasize) {
devpriv->dmabytestomove[0] =
devpriv->ai_data_len;
s->async->prealloc_bufsz;
devpriv->dmabytestomove[1] =
devpriv->ai_data_len;
s->async->prealloc_bufsz;
}
if (cmd->stop_src == TRIG_NONE) {
devpriv->dma_runs_to_end = 1;
@ -856,7 +855,6 @@ static int pcl812_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
} else
devpriv->ai_dma = 0;
devpriv->ai_data_len = s->async->prealloc_bufsz;
devpriv->ai_act_scan = 0;
devpriv->ai_poll_ptr = 0;
s->async->cur_chan = 0;