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staging: comedi: pass subdevice to comedi_buf_is_mmapped()

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Change the parameters of `comedi_buf_is_mmapped()` to pass a pointer to
the comedi subdevice instead of a pointer to the "async" structure
belonging to the subdevice.

The main aim at the moment is to replace all the `struct comedi_async *`
parameters with `struct comedi_subdevice *` parameters in the comedi
driver API.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott 2014-05-06 13:12:11 +01:00 committed by Greg Kroah-Hartman
parent fcc18a9aa2
commit d4526ab4e0
3 changed files with 5 additions and 5 deletions
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4
drivers/staging/comedi/comedi_buf.c
View File

@ -183,9 +183,9 @@ comedi_buf_map_from_subdev_get(struct comedi_subdevice *s)
return bm;
}
bool comedi_buf_is_mmapped(struct comedi_async *async)
bool comedi_buf_is_mmapped(struct comedi_subdevice *s)
{
struct comedi_buf_map *bm = async->buf_map;
struct comedi_buf_map *bm = s->async->buf_map;
return bm && (atomic_read(&bm->refcount.refcount) > 1);
}

4
drivers/staging/comedi/comedi_fops.c
View File

@ -251,7 +251,7 @@ static int resize_async_buffer(struct comedi_device *dev,
"subdevice is busy, cannot resize buffer\n");
return -EBUSY;
}
if (comedi_buf_is_mmapped(async)) {
if (comedi_buf_is_mmapped(s)) {
dev_dbg(dev->class_dev,
"subdevice is mmapped, cannot resize buffer\n");
return -EBUSY;
@ -635,7 +635,7 @@ static int is_device_busy(struct comedi_device *dev)
s = &dev->subdevices[i];
if (s->busy)
return 1;
if (s->async && comedi_buf_is_mmapped(s->async))
if (s->async && comedi_buf_is_mmapped(s))
return 1;
}

2
drivers/staging/comedi/comedi_internal.h
View File

@ -16,7 +16,7 @@ void comedi_free_subdevice_minor(struct comedi_subdevice *s);
int comedi_buf_alloc(struct comedi_device *dev, struct comedi_subdevice *s,
unsigned long new_size);
void comedi_buf_reset(struct comedi_subdevice *s);
bool comedi_buf_is_mmapped(struct comedi_async *async);
bool comedi_buf_is_mmapped(struct comedi_subdevice *s);
void comedi_buf_map_get(struct comedi_buf_map *bm);
int comedi_buf_map_put(struct comedi_buf_map *bm);
struct comedi_buf_map *comedi_buf_map_from_subdev_get(