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staging: comedi: pcl818: use comedi_async 'scans_done' to detect EOA 

Remove the private data member 'ai_act_scan' and use the comedi_async
'scans_done' member to detect the end-of-acquisition.

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 2014-11-05 10:20:59 -07:00 committed by Greg Kroah-Hartman
parent 42dafac3a5
commit c76844e1ff
1 changed files with 6 additions and 9 deletions
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15
drivers/staging/comedi/drivers/pcl818.c
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@ -313,7 +313,6 @@ struct pcl818_private {
unsigned long last_dma_run; /* how many bytes we must transfer on last DMA page */
unsigned int ns_min; /* manimal allowed delay between samples (in us) for actual card */
int i8253_osc_base; /* 1/frequency of on board oscilator in ns */
int ai_act_scan; /* how many scans we finished */
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 */
@ -524,11 +523,8 @@ static bool pcl818_ai_next_chan(struct comedi_device *dev,
if (devpriv->act_chanlist_pos >= devpriv->act_chanlist_len)
devpriv->act_chanlist_pos = 0;
if (s->async->cur_chan == 0)
devpriv->ai_act_scan--;
if (cmd->stop_src == TRIG_COUNT && devpriv->ai_act_scan == 0) {
/* all data sampled */
if (cmd->stop_src == TRIG_COUNT &&
s->async->scans_done >= cmd->stop_arg) {
s->async->events |= COMEDI_CB_EOA;
return false;
}
@ -635,6 +631,7 @@ static irqreturn_t pcl818_interrupt(int irq, void *d)
struct comedi_device *dev = d;
struct pcl818_private *devpriv = dev->private;
struct comedi_subdevice *s = dev->read_subdev;
struct comedi_cmd *cmd = &s->async->cmd;
if (!dev->attached || !devpriv->ai_cmd_running) {
pcl818_ai_clear_eoc(dev);
@ -648,7 +645,7 @@ static irqreturn_t pcl818_interrupt(int irq, void *d)
* being reprogrammed while a DMA transfer is in
* progress.
*/
devpriv->ai_act_scan = 0;
s->async->scans_done = cmd->stop_arg;
s->cancel(dev, s);
return IRQ_HANDLED;
}
@ -822,7 +819,6 @@ static int pcl818_ai_cmd(struct comedi_device *dev,
pcl818_ai_setup_chanlist(dev, cmd->chanlist, seglen);
devpriv->ai_data_len = s->async->prealloc_bufsz;
devpriv->ai_act_scan = cmd->stop_arg;
devpriv->ai_cmd_running = 1;
devpriv->ai_cmd_canceled = 0;
devpriv->act_chanlist_pos = 0;
@ -865,7 +861,8 @@ static int pcl818_ai_cancel(struct comedi_device *dev,
if (devpriv->dma) {
if (cmd->stop_src == TRIG_NONE ||
(cmd->stop_src == TRIG_COUNT && devpriv->ai_act_scan > 0)) {
(cmd->stop_src == TRIG_COUNT &&
s->async->scans_done < cmd->stop_arg)) {
if (!devpriv->ai_cmd_canceled) {
/*
* Wait for running dma transfer to end,