staging: comedi: dt2814: Remove struct dt2814_private

The `ntrig` member of the `struct dt2814_private` pointed to by
`dev->private` is no longer used as a counter to determine the end of
acquisition for a Comedi asynchronous command.  The other member
`curadscan` is also unused.  Remove the allocation of the private data
during initialization and remove the definition of `struct
dt2814_private` since they are no longer needed.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Link: https://lore.kernel.org/r/20210301165757.243065-6-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/dt2814.c b/drivers/staging/comedi/drivers/dt2814.c
index 6f6d0b2bb44b5eddefaae16332f12b7b88da595e..d18f9a5a9fb106f99ef2390488c4d52786352cdb 100644 (file)
--- a/drivers/staging/comedi/drivers/dt2814.c
+++ b/drivers/staging/comedi/drivers/dt2814.c
@@ -44,11 +44,6 @@
 #define DT2814_ENB 0x10
 #define DT2814_CHANMASK 0x0f
 
-struct dt2814_private {
-       int ntrig;
-       int curadchan;
-};
-
 #define DT2814_TIMEOUT 10
 #define DT2814_MAX_SPEED 100000        /* Arbitrary 10 khz limit */
 
@@ -207,7 +202,6 @@ static int dt2814_ai_cmdtest(struct comedi_device *dev,
 
 static int dt2814_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 {
-       struct dt2814_private *devpriv = dev->private;
        struct comedi_cmd *cmd = &s->async->cmd;
        int chan;
        int trigvar;
@@ -217,7 +211,6 @@ static int dt2814_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 
        chan = CR_CHAN(cmd->chanlist[0]);
 
-       devpriv->ntrig = cmd->stop_arg;
        outb(chan | DT2814_ENB | (trigvar << 5), dev->iobase + DT2814_CSR);
 
        return 0;
@@ -310,7 +303,6 @@ static irqreturn_t dt2814_interrupt(int irq, void *d)
 
 static int dt2814_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 {
-       struct dt2814_private *devpriv;
        struct comedi_subdevice *s;
        int ret;
 
@@ -335,10 +327,6 @@ static int dt2814_attach(struct comedi_device *dev, struct comedi_devconfig *it)
        if (ret)
                return ret;
 
-       devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
-       if (!devpriv)
-               return -ENOMEM;
-
        s = &dev->subdevices[0];
        s->type = COMEDI_SUBD_AI;
        s->subdev_flags = SDF_READABLE | SDF_GROUND;