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staging: comedi: comedidev.h: add namespace to the subdevice "runflags"

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Tidy up and document the subdevice "runflags". Rename them so they have
comedi namespace.

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>
This commit is contained in:
H Hartley Sweeten 2015-01-20 12:06:00 -07:00 committed by Greg Kroah-Hartman
parent 738e1e1bd7
commit 84bb0bccd2
3 changed files with 35 additions and 22 deletions
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30
drivers/staging/comedi/comedi_fops.c
View File

@ -604,7 +604,7 @@ bool comedi_is_subdevice_running(struct comedi_subdevice *s)
{
unsigned runflags = comedi_get_subdevice_runflags(s);
return (runflags & SRF_RUNNING) ? true : false;
return (runflags & COMEDI_SRF_RUNNING) ? true : false;
}
EXPORT_SYMBOL_GPL(comedi_is_subdevice_running);
@ -612,14 +612,14 @@ static bool comedi_is_subdevice_in_error(struct comedi_subdevice *s)
{
unsigned runflags = comedi_get_subdevice_runflags(s);
return (runflags & SRF_ERROR) ? true : false;
return (runflags & COMEDI_SRF_ERROR) ? true : false;
}
static bool comedi_is_subdevice_idle(struct comedi_subdevice *s)
{
unsigned runflags = comedi_get_subdevice_runflags(s);
return (runflags & (SRF_ERROR | SRF_RUNNING)) ? false : true;
return (runflags & COMEDI_SRF_BUSY_MASK) ? false : true;
}
/**
@ -634,7 +634,7 @@ void *comedi_alloc_spriv(struct comedi_subdevice *s, size_t size)
{
s->private = kzalloc(size, GFP_KERNEL);
if (s->private)
s->runflags |= SRF_FREE_SPRIV;
s->runflags |= COMEDI_SRF_FREE_SPRIV;
return s->private;
}
EXPORT_SYMBOL_GPL(comedi_alloc_spriv);
@ -647,7 +647,7 @@ static void do_become_nonbusy(struct comedi_device *dev,
{
struct comedi_async *async = s->async;
comedi_set_subdevice_runflags(s, SRF_RUNNING, 0);
comedi_set_subdevice_runflags(s, COMEDI_SRF_RUNNING, 0);
if (async) {
comedi_buf_reset(s);
async->inttrig = NULL;
@ -1634,10 +1634,13 @@ static int do_cmd_ioctl(struct comedi_device *dev,
if (async->cmd.flags & CMDF_WAKE_EOS)
async->cb_mask |= COMEDI_CB_EOS;
comedi_set_subdevice_runflags(s, SRF_ERROR | SRF_RUNNING, SRF_RUNNING);
comedi_set_subdevice_runflags(s, COMEDI_SRF_BUSY_MASK,
COMEDI_SRF_RUNNING);
/* set s->busy _after_ setting SRF_RUNNING flag to avoid race with
* comedi_read() or comedi_write() */
/*
* Set s->busy _after_ setting COMEDI_SRF_RUNNING flag to avoid
* race with comedi_read() or comedi_write().
*/
s->busy = file;
ret = s->do_cmd(dev, s);
if (ret == 0)
@ -2591,18 +2594,21 @@ void comedi_event(struct comedi_device *dev, struct comedi_subdevice *s)
return;
if (s->async->events & COMEDI_CB_CANCEL_MASK)
runflags_mask |= SRF_RUNNING;
runflags_mask |= COMEDI_SRF_RUNNING;
/*
* Remember if an error event has occurred, so an error
* can be returned the next time the user does a read().
*/
if (s->async->events & COMEDI_CB_ERROR_MASK) {
runflags_mask |= SRF_ERROR;
runflags |= SRF_ERROR;
runflags_mask |= COMEDI_SRF_ERROR;
runflags |= COMEDI_SRF_ERROR;
}
if (runflags_mask) {
/*sets SRF_ERROR and SRF_RUNNING together atomically */
/*
* Sets COMEDI_SRF_ERROR and COMEDI_SRF_RUNNING together
* atomically.
*/
comedi_set_subdevice_runflags(s, runflags_mask, runflags);
}

25
drivers/staging/comedi/comedidev.h
View File

@ -302,15 +302,22 @@ void comedi_event(struct comedi_device *dev, struct comedi_subdevice *s);
struct comedi_device *comedi_dev_get_from_minor(unsigned minor);
int comedi_dev_put(struct comedi_device *dev);
/* subdevice runflags */
enum subdevice_runflags {
SRF_RT = 0x00000002,
/* indicates an COMEDI_CB_ERROR event has occurred since the last
* command was started */
SRF_ERROR = 0x00000004,
SRF_RUNNING = 0x08000000,
SRF_FREE_SPRIV = 0x80000000, /* free s->private on detach */
};
/**
* comedi_subdevice "runflags"
* @COMEDI_SRF_RT: DEPRECATED: command is running real-time
* @COMEDI_SRF_ERROR: indicates an COMEDI_CB_ERROR event has occurred
* since the last command was started
* @COMEDI_SRF_RUNNING: command is running
* @COMEDI_SRF_FREE_SPRIV: free s->private on detach
*
* @COMEDI_SRF_BUSY_MASK: runflags that indicate the subdevice is "busy"
*/
#define COMEDI_SRF_RT BIT(1)
#define COMEDI_SRF_ERROR BIT(2)
#define COMEDI_SRF_RUNNING BIT(27)
#define COMEDI_SRF_FREE_SPRIV BIT(31)
#define COMEDI_SRF_BUSY_MASK (COMEDI_SRF_ERROR | COMEDI_SRF_RUNNING)
bool comedi_is_subdevice_running(struct comedi_subdevice *s);

2
drivers/staging/comedi/drivers.c
View File

@ -125,7 +125,7 @@ static void comedi_device_detach_cleanup(struct comedi_device *dev)
if (dev->subdevices) {
for (i = 0; i < dev->n_subdevices; i++) {
s = &dev->subdevices[i];
if (s->runflags & SRF_FREE_SPRIV)
if (s->runflags & COMEDI_SRF_FREE_SPRIV)
kfree(s->private);
comedi_free_subdevice_minor(s);
if (s->async) {