staging: comedi: pcmuio: remove 'num_asic_chans'

This member of the subdevice private data is always initialize to
s->n_chan if the subdevice supports interrupts and is only used
in functions that can be called by the interrupt subdevice.

Simplyfy the driver a bit  by removing it and just using s->n_chan.

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>

1 files changed, 3 insertions, 10 deletions

diff --git a/drivers/staging/comedi/drivers/pcmuio.c b/drivers/staging/comedi/drivers/pcmuio.c
index 8771e4b5d4cb..e5758814e161 100644
--- a/drivers/staging/comedi/drivers/pcmuio.c
+++ b/drivers/staging/comedi/drivers/pcmuio.c
@@ -153,11 +153,6 @@ struct pcmuio_subdev_private {
                 /* if non-negative, this subdev has an interrupt asic */
                 int asic;
                 /*
-                 * the number of asic channels in this
-                 * subdev that have interrutps
-                 */
-                int num_asic_chans;
-                /*
                  * if nonnegative, the first channel id with
                  * respect to the asic that has interrupts
                  */
@@ -374,7 +369,7 @@ static void pcmuio_handle_intr_subdev(struct comedi_device *dev,
                 goto done;
 
         mytrig = triggered >> subpriv->intr.asic_chan;
-        mytrig &= ((0x1 << subpriv->intr.num_asic_chans) - 1);
+        mytrig &= ((0x1 << s->n_chan) - 1);
 
         if (!(mytrig & subpriv->intr.enabled_mask))
                 goto done;
@@ -517,7 +512,7 @@ static int pcmuio_start_intr(struct comedi_device *dev,
                                     << CR_CHAN(cmd->chanlist[n]);
                         }
                 }
-                bits &= ((0x1 << subpriv->intr.num_asic_chans) - 1);
+                bits &= ((0x1 << s->n_chan) - 1);
                 subpriv->intr.enabled_mask = bits;
 
                 /* set pol and enab intrs for this subdev.. */
@@ -724,7 +719,6 @@ static int pcmuio_attach(struct comedi_device *dev, struct comedi_devconfig *it)
                 s->n_chan = min(chans_left, MAX_CHANS_PER_SUBDEV);
                 subpriv->intr.asic = -1;
                 subpriv->intr.asic_chan = -1;
-                subpriv->intr.num_asic_chans = -1;
                 subpriv->intr.active = 0;
                 s->len_chanlist = 1;
 
@@ -748,13 +742,12 @@ static int pcmuio_attach(struct comedi_device *dev, struct comedi_devconfig *it)
                                 subpriv->intr.active = 0;
                                 subpriv->intr.stop_count = 0;
                                 subpriv->intr.asic_chan = thisasic_chanct;
-                                subpriv->intr.num_asic_chans = s->n_chan;
                                 dev->read_subdev = s;
                                 s->subdev_flags |= SDF_CMD_READ;
                                 s->cancel = pcmuio_cancel;
                                 s->do_cmd = pcmuio_cmd;
                                 s->do_cmdtest = pcmuio_cmdtest;
-                                s->len_chanlist = subpriv->intr.num_asic_chans;
+                                s->len_chanlist = s->n_chan;
                         }
                         thisasic_chanct += CHANS_PER_PORT;
                 }