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staging: comedi: pass subdevice to comedi_buf_write_n_available()

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Local function `comedi_buf_write_n_available()` currently takes a
pointer to a `struct comedi_async`.  Change it to take a pointer to a
`struct comedi_subdevice` and use the `async` member for consistency
with the other comedi buffer handling functions.

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 13:12:14 +01:00 committed by Greg Kroah-Hartman
parent 8ab4fe7e13
commit a1c0e5fe68
1 changed files with 3 additions and 2 deletions
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5
drivers/staging/comedi/comedi_buf.c
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@ -243,8 +243,9 @@ void comedi_buf_reset(struct comedi_subdevice *s)
async->events = 0;
}
static unsigned int comedi_buf_write_n_available(struct comedi_async *async)
static unsigned int comedi_buf_write_n_available(struct comedi_subdevice *s)
{
struct comedi_async *async = s->async;
unsigned int free_end = async->buf_read_count + async->prealloc_bufsz;
return free_end - async->buf_write_alloc_count;
@ -255,7 +256,7 @@ static unsigned int __comedi_buf_write_alloc(struct comedi_subdevice *s,
int strict)
{
struct comedi_async *async = s->async;
unsigned int available = comedi_buf_write_n_available(async);
unsigned int available = comedi_buf_write_n_available(s);
if (nbytes > available)
nbytes = strict ? 0 : available;