From d9990ceacc39b4320661adf7778538858a5c4bad Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Tue, 18 Jun 2013 13:22:07 -0700 Subject: [PATCH] staging: comedi: pcmuio: remove 'first_chan' This member of the subdevice private data is always initialize to '0' due to the 'byte_no' always being zero when it is set during the attach. Simplify the driver a bit by removing it. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/pcmuio.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/drivers/staging/comedi/drivers/pcmuio.c b/drivers/staging/comedi/drivers/pcmuio.c index 0e71eac..8771e4b 100644 --- a/drivers/staging/comedi/drivers/pcmuio.c +++ b/drivers/staging/comedi/drivers/pcmuio.c @@ -152,8 +152,6 @@ struct pcmuio_subdev_private { struct { /* if non-negative, this subdev has an interrupt asic */ int asic; - /* if nonnegative, the first channel id for interrupts */ - int first_chan; /* * the number of asic channels in this * subdev that have interrutps @@ -377,7 +375,6 @@ static void pcmuio_handle_intr_subdev(struct comedi_device *dev, mytrig = triggered >> subpriv->intr.asic_chan; mytrig &= ((0x1 << subpriv->intr.num_asic_chans) - 1); - mytrig <<= subpriv->intr.first_chan; if (!(mytrig & subpriv->intr.enabled_mask)) goto done; @@ -520,8 +517,7 @@ static int pcmuio_start_intr(struct comedi_device *dev, << CR_CHAN(cmd->chanlist[n]); } } - bits &= ((0x1 << subpriv->intr.num_asic_chans) - - 1) << subpriv->intr.first_chan; + bits &= ((0x1 << subpriv->intr.num_asic_chans) - 1); subpriv->intr.enabled_mask = bits; /* set pol and enab intrs for this subdev.. */ @@ -727,7 +723,6 @@ static int pcmuio_attach(struct comedi_device *dev, struct comedi_devconfig *it) s->insn_config = pcmuio_dio_insn_config; s->n_chan = min(chans_left, MAX_CHANS_PER_SUBDEV); subpriv->intr.asic = -1; - subpriv->intr.first_chan = -1; subpriv->intr.asic_chan = -1; subpriv->intr.num_asic_chans = -1; subpriv->intr.active = 0; @@ -752,10 +747,8 @@ static int pcmuio_attach(struct comedi_device *dev, struct comedi_devconfig *it) subpriv->intr.asic = asic; subpriv->intr.active = 0; subpriv->intr.stop_count = 0; - subpriv->intr.first_chan = byte_no * 8; subpriv->intr.asic_chan = thisasic_chanct; - subpriv->intr.num_asic_chans = - s->n_chan - subpriv->intr.first_chan; + subpriv->intr.num_asic_chans = s->n_chan; dev->read_subdev = s; s->subdev_flags |= SDF_CMD_READ; s->cancel = pcmuio_cancel; -- 2.7.4