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

Remove the private data member 'stop_count' 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>

diff --git a/drivers/staging/comedi/drivers/pcmuio.c b/drivers/staging/comedi/drivers/pcmuio.c
index 18c2ac28e34afbba5021c1bd13dd433652740642..0f5483b6147f4aac7ac1a74f56852b6467631114 100644 (file)
--- a/drivers/staging/comedi/drivers/pcmuio.c
+++ b/drivers/staging/comedi/drivers/pcmuio.c
@@ -130,7 +130,6 @@ struct pcmuio_asic {
        spinlock_t pagelock;    /* protects the page registers */
        spinlock_t spinlock;    /* protects member variables */
        unsigned int enabled_mask;
-       unsigned int stop_count;
        unsigned int active:1;
 };
 
@@ -338,14 +337,9 @@ static void pcmuio_handle_intr_subdev(struct comedi_device *dev,
 
        comedi_buf_write_samples(s, &val, 1);
 
-       /* Check for end of acquisition. */
-       if (cmd->stop_src == TRIG_COUNT) {
-               if (chip->stop_count > 0) {
-                       chip->stop_count--;
-                       if (chip->stop_count == 0)
-                               s->async->events |= COMEDI_CB_EOA;
-               }
-       }
+       if (cmd->stop_src == TRIG_COUNT &&
+           s->async->scans_done >= cmd->stop_arg)
+               s->async->events |= COMEDI_CB_EOA;
 
 done:
        spin_unlock_irqrestore(&chip->spinlock, flags);
@@ -474,8 +468,6 @@ static int pcmuio_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
        spin_lock_irqsave(&chip->spinlock, flags);
        chip->active = 1;
 
-       chip->stop_count = cmd->stop_arg;
-
        /* Set up start of acquisition. */
        if (cmd->start_src == TRIG_INT)
                s->async->inttrig = pcmuio_inttrig_start_intr;