Only subdevice[2], the dio interrupt subdevice, uses the subdevice private data.
Move the members from struct pcmmio_subdev_private to struct pcmmio_private and
remove the subdevice private data. This also allows removing the allocation and
freeing of devpriv->sprivs.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/pcmmio.c | 120 +++++++++++---------------------
1 file changed, 41 insertions(+), 79 deletions(-)
diff --git a/drivers/staging/comedi/drivers/pcmmio.c
b/drivers/staging/comedi/drivers/pcmmio.c
index 8e00d12..1e1f57e 100644
--- a/drivers/staging/comedi/drivers/pcmmio.c
+++ b/drivers/staging/comedi/drivers/pcmmio.c
@@ -201,35 +201,13 @@ static const struct comedi_lrange pcmmio_ao_ranges = {
}
};
-/* this structure is for data unique to this subdevice. */
-struct pcmmio_subdev_private {
-
- union {
- struct {
-
- /* The below is only used for intr subdevices */
- struct {
- /*
- * subdev-relative channel mask for channels
- * we are interested in
- */
- int enabled_mask;
- int active;
- int stop_count;
- int continuous;
- spinlock_t spinlock;
- } intr;
- } dio;
- };
-};
-
-/*
- * this structure is for data unique to this hardware driver. If
- * several hardware drivers keep similar information in this structure,
- * feel free to suggest moving the variable to the struct comedi_device struct.
- */
struct pcmmio_private {
spinlock_t pagelock; /* protects the page registers */
+ spinlock_t spinlock; /* protects the member variables */
+ int enabled_mask;
+ int active;
+ int stop_count;
+ int continuous;
struct pcmmio_subdev_private *sprivs;
unsigned int ao_readback[8];
@@ -366,10 +344,10 @@ static void pcmmio_reset(struct comedi_device *dev)
static void pcmmio_stop_intr(struct comedi_device *dev,
struct comedi_subdevice *s)
{
- struct pcmmio_subdev_private *subpriv = s->private;
+ struct pcmmio_private *devpriv = dev->private;
- subpriv->dio.intr.enabled_mask = 0;
- subpriv->dio.intr.active = 0;
+ devpriv->enabled_mask = 0;
+ devpriv->active = 0;
s->async->inttrig = NULL;
/* disable all dio interrupts */
@@ -381,7 +359,6 @@ static irqreturn_t interrupt_pcmmio(int irq, void *d)
struct comedi_device *dev = d;
struct pcmmio_private *devpriv = dev->private;
struct comedi_subdevice *s = dev->read_subdev;
- struct pcmmio_subdev_private *subpriv = s->private;
int got1 = 0;
unsigned long flags;
@@ -433,21 +410,19 @@ static irqreturn_t interrupt_pcmmio(int irq, void *d)
unsigned long flags;
unsigned oldevents;
- spin_lock_irqsave(&subpriv->dio.
- intr.spinlock,
+
spin_lock_irqsave(&devpriv->spinlock,
flags);
oldevents = s->async->events;
- if (subpriv->dio.intr.active) {
+ if (devpriv->active) {
unsigned mytrig =
((triggered >> 0)
&
((0x1 << 24) -
1)) << 0;
if (mytrig &
- subpriv->dio.
- intr.enabled_mask) {
+
devpriv->enabled_mask) {
unsigned int val
= 0;
unsigned int n,
@@ -479,11 +454,11 @@ static irqreturn_t interrupt_pcmmio(int irq, void *d)
}
/* Check for
end of acquisition. */
- if
(!subpriv->dio.intr.continuous) {
+ if
(!devpriv->continuous) {
/*
stop_src == TRIG_COUNT */
- if
(subpriv->dio.intr.stop_count > 0) {
-
subpriv->dio.intr.stop_count--;
-
if (subpriv->dio.intr.stop_count == 0) {
+ if
(devpriv->stop_count > 0) {
+
devpriv->stop_count--;
+
if (devpriv->stop_count == 0) {
s->async->events |= COMEDI_CB_EOA;
/* TODO: STOP_ACQUISITION_CALL_HERE!! */
pcmmio_stop_intr
@@ -496,8 +471,7 @@ static irqreturn_t interrupt_pcmmio(int irq, void *d)
}
spin_unlock_irqrestore
- (&subpriv->dio.intr.
- spinlock, flags);
+ (&devpriv->spinlock, flags);
if (oldevents !=
s->async->events) {
@@ -514,20 +488,20 @@ static irqreturn_t interrupt_pcmmio(int irq, void *d)
static int pcmmio_start_intr(struct comedi_device *dev,
struct comedi_subdevice *s)
{
- struct pcmmio_subdev_private *subpriv = s->private;
+ struct pcmmio_private *devpriv = dev->private;
- if (!subpriv->dio.intr.continuous && subpriv->dio.intr.stop_count == 0)
{
+ if (!devpriv->continuous && devpriv->stop_count == 0) {
/* An empty acquisition! */
s->async->events |= COMEDI_CB_EOA;
- subpriv->dio.intr.active = 0;
+ devpriv->active = 0;
return 1;
} else {
unsigned bits = 0, pol_bits = 0, n;
int nports, firstport, port;
struct comedi_cmd *cmd = &s->async->cmd;
- subpriv->dio.intr.enabled_mask = 0;
- subpriv->dio.intr.active = 1;
+ devpriv->enabled_mask = 0;
+ devpriv->active = 1;
nports = 24 / CHANS_PER_PORT;
firstport = 0 / CHANS_PER_PORT;
if (cmd->chanlist) {
@@ -540,7 +514,7 @@ static int pcmmio_start_intr(struct comedi_device *dev,
}
}
bits &= ((0x1 << 24) - 1) << 0;
- subpriv->dio.intr.enabled_mask = bits;
+ devpriv->enabled_mask = bits;
{
/*
@@ -577,13 +551,13 @@ static int pcmmio_start_intr(struct comedi_device *dev,
static int pcmmio_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
{
- struct pcmmio_subdev_private *subpriv = s->private;
+ struct pcmmio_private *devpriv = dev->private;
unsigned long flags;
- spin_lock_irqsave(&subpriv->dio.intr.spinlock, flags);
- if (subpriv->dio.intr.active)
+ spin_lock_irqsave(&devpriv->spinlock, flags);
+ if (devpriv->active)
pcmmio_stop_intr(dev, s);
- spin_unlock_irqrestore(&subpriv->dio.intr.spinlock, flags);
+ spin_unlock_irqrestore(&devpriv->spinlock, flags);
return 0;
}
@@ -595,18 +569,18 @@ static int
pcmmio_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice
*s,
unsigned int trignum)
{
- struct pcmmio_subdev_private *subpriv = s->private;
+ struct pcmmio_private *devpriv = dev->private;
unsigned long flags;
int event = 0;
if (trignum != 0)
return -EINVAL;
- spin_lock_irqsave(&subpriv->dio.intr.spinlock, flags);
+ spin_lock_irqsave(&devpriv->spinlock, flags);
s->async->inttrig = NULL;
- if (subpriv->dio.intr.active)
+ if (devpriv->active)
event = pcmmio_start_intr(dev, s);
- spin_unlock_irqrestore(&subpriv->dio.intr.spinlock, flags);
+ spin_unlock_irqrestore(&devpriv->spinlock, flags);
if (event)
comedi_event(dev, s);
@@ -619,24 +593,24 @@ pcmmio_inttrig_start_intr(struct comedi_device *dev,
struct comedi_subdevice *s,
*/
static int pcmmio_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
{
- struct pcmmio_subdev_private *subpriv = s->private;
+ struct pcmmio_private *devpriv = dev->private;
struct comedi_cmd *cmd = &s->async->cmd;
unsigned long flags;
int event = 0;
- spin_lock_irqsave(&subpriv->dio.intr.spinlock, flags);
- subpriv->dio.intr.active = 1;
+ spin_lock_irqsave(&devpriv->spinlock, flags);
+ devpriv->active = 1;
/* Set up end of acquisition. */
switch (cmd->stop_src) {
case TRIG_COUNT:
- subpriv->dio.intr.continuous = 0;
- subpriv->dio.intr.stop_count = cmd->stop_arg;
+ devpriv->continuous = 0;
+ devpriv->stop_count = cmd->stop_arg;
break;
default:
/* TRIG_NONE */
- subpriv->dio.intr.continuous = 1;
- subpriv->dio.intr.stop_count = 0;
+ devpriv->continuous = 1;
+ devpriv->stop_count = 0;
break;
}
@@ -650,7 +624,7 @@ static int pcmmio_cmd(struct comedi_device *dev, struct
comedi_subdevice *s)
event = pcmmio_start_intr(dev, s);
break;
}
- spin_unlock_irqrestore(&subpriv->dio.intr.spinlock, flags);
+ spin_unlock_irqrestore(&devpriv->spinlock, flags);
if (event)
comedi_event(dev, s);
@@ -875,7 +849,6 @@ static int pcmmio_ao_insn_write(struct comedi_device *dev,
static int pcmmio_attach(struct comedi_device *dev, struct comedi_devconfig
*it)
{
struct pcmmio_private *devpriv;
- struct pcmmio_subdev_private *subpriv;
struct comedi_subdevice *s;
int ret;
@@ -889,11 +862,6 @@ static int pcmmio_attach(struct comedi_device *dev, struct
comedi_devconfig *it)
spin_lock_init(&devpriv->pagelock);
- devpriv->sprivs = kcalloc(4, sizeof(struct pcmmio_subdev_private),
- GFP_KERNEL);
- if (!devpriv->sprivs)
- return -ENOMEM;
-
ret = comedi_alloc_subdevices(dev, 4);
if (ret)
return ret;
@@ -945,12 +913,10 @@ static int pcmmio_attach(struct comedi_device *dev,
struct comedi_devconfig *it)
s->do_cmd = pcmmio_cmd;
s->do_cmdtest = pcmmio_cmdtest;
- s->private = &devpriv->sprivs[2];
- subpriv = s->private;
- subpriv->dio.intr.active = 0;
- subpriv->dio.intr.stop_count = 0;
+ devpriv->active = 0;
+ devpriv->stop_count = 0;
- spin_lock_init(&subpriv->dio.intr.spinlock);
+ spin_lock_init(&devpriv->spinlock);
/* Digital I/O subdevice */
s = &dev->subdevices[3];
@@ -976,10 +942,6 @@ static int pcmmio_attach(struct comedi_device *dev, struct
comedi_devconfig *it)
static void pcmmio_detach(struct comedi_device *dev)
{
- struct pcmmio_private *devpriv = dev->private;
-
- if (devpriv)
- kfree(devpriv->sprivs);
comedi_legacy_detach(dev);
}
--
1.8.4.4
_______________________________________________
devel mailing list
de...@linuxdriverproject.org
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
