[PATCH 07/22] staging: comedi: ni_tiocmd: pass subdevice to command setup functions
Ian Abbott
abbotti at mev.co.uk
Fri May 2 12:50:19 UTC 2014
The `ni_tio_input_cmd()`, `ni_tio_output_cmd()` and `ni_tio_cmd_setup()`
functions are called from `ni_tio_cmd()` to set up a comedi command.
They currently get passed two parameters, a pointer to a `struct
ni_gpct` and a pointer to a `struct comedi_async`, but both of those
come from members of a `struct comedi_subdevice` (the former from the
`private` member). Replace the parameters with a pointer to the `struct
comedi_subdevice`.
The main motive is to make the comedi subdevice more easily available to
the functions for the use of subsequent patches to remove the `struct
comedi_async *` parameters from the comedi buffer handling functions.
Signed-off-by: Ian Abbott <abbotti at mev.co.uk>
---
drivers/staging/comedi/drivers/ni_tiocmd.c | 20 ++++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)
diff --git a/drivers/staging/comedi/drivers/ni_tiocmd.c b/drivers/staging/comedi/drivers/ni_tiocmd.c
index b9d23db..7a163fc 100644
--- a/drivers/staging/comedi/drivers/ni_tiocmd.c
+++ b/drivers/staging/comedi/drivers/ni_tiocmd.c
@@ -115,10 +115,12 @@ static int ni_tio_input_inttrig(struct comedi_device *dev,
return retval;
}
-static int ni_tio_input_cmd(struct ni_gpct *counter, struct comedi_async *async)
+static int ni_tio_input_cmd(struct comedi_subdevice *s)
{
+ struct ni_gpct *counter = s->private;
struct ni_gpct_device *counter_dev = counter->counter_dev;
unsigned cidx = counter->counter_index;
+ struct comedi_async *async = s->async;
struct comedi_cmd *cmd = &async->cmd;
int retval = 0;
@@ -164,9 +166,10 @@ static int ni_tio_input_cmd(struct ni_gpct *counter, struct comedi_async *async)
return retval;
}
-static int ni_tio_output_cmd(struct ni_gpct *counter,
- struct comedi_async *async)
+static int ni_tio_output_cmd(struct comedi_subdevice *s)
{
+ struct ni_gpct *counter = s->private;
+
dev_err(counter->counter_dev->dev->class_dev,
"output commands not yet implemented.\n");
return -ENOTSUPP;
@@ -178,9 +181,10 @@ static int ni_tio_output_cmd(struct ni_gpct *counter,
return ni_tio_arm(counter, 1, NI_GPCT_ARM_IMMEDIATE);
}
-static int ni_tio_cmd_setup(struct ni_gpct *counter, struct comedi_async *async)
+static int ni_tio_cmd_setup(struct comedi_subdevice *s)
{
- struct comedi_cmd *cmd = &async->cmd;
+ struct comedi_cmd *cmd = &s->async->cmd;
+ struct ni_gpct *counter = s->private;
unsigned cidx = counter->counter_index;
int set_gate_source = 0;
unsigned gate_source;
@@ -219,12 +223,12 @@ int ni_tio_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
"Interrupt-driven commands not yet implemented.\n");
retval = -EIO;
} else {
- retval = ni_tio_cmd_setup(counter, async);
+ retval = ni_tio_cmd_setup(s);
if (retval == 0) {
if (cmd->flags & CMDF_WRITE)
- retval = ni_tio_output_cmd(counter, async);
+ retval = ni_tio_output_cmd(s);
else
- retval = ni_tio_input_cmd(counter, async);
+ retval = ni_tio_input_cmd(s);
}
}
spin_unlock_irqrestore(&counter->lock, flags);
--
1.9.2
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