diff options
author | H Hartley Sweeten <hsweeten@visionengravers.com> | 2016-04-20 10:36:39 -0700 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-28 22:18:51 -0700 |
commit | 51d430056c2a695ff7ffc62ae917c413616ec6b2 (patch) | |
tree | 59ebf8ce24b512d474c80777b37db36e78baed84 /drivers/staging/comedi/drivers/mite.h | |
parent | 33b0b6913d1304407f71a6a92ef1ad9e064cdf01 (diff) |
staging: comedi: mite: introduce mite_sync_dma()
The struct mite_channel 'dir' member specifies if the dma is input
or output. Wrap the mite_sync_input_dma() and mite_sync_output_dma()
functions with a single mite_sync_dma() so that the drivers don't
have to worry about the sync direction.
The functions that actually sync the input/output dma currently return
-1 if an overflow/underrun is detected otherwise they return 0. If an
overflow/underrun is detected the async->event COMEDI_CB_OVERFLOW is
also set.
The callers never check the return value anyway so just make the
functions return void. The async->event can be checked if necessary
to detect any errors.
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>
Diffstat (limited to 'drivers/staging/comedi/drivers/mite.h')
-rw-r--r-- | drivers/staging/comedi/drivers/mite.h | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/drivers/staging/comedi/drivers/mite.h b/drivers/staging/comedi/drivers/mite.h index 8d203851defb..998253993232 100644 --- a/drivers/staging/comedi/drivers/mite.h +++ b/drivers/staging/comedi/drivers/mite.h @@ -90,10 +90,7 @@ void mite_release_channel(struct mite_channel *mite_chan); void mite_dma_arm(struct mite_channel *mite_chan); void mite_dma_disarm(struct mite_channel *mite_chan); -int mite_sync_input_dma(struct mite_channel *mite_chan, - struct comedi_subdevice *s); -int mite_sync_output_dma(struct mite_channel *mite_chan, - struct comedi_subdevice *s); +void mite_sync_dma(struct mite_channel *mite_chan, struct comedi_subdevice *s); u32 mite_bytes_in_transit(struct mite_channel *mite_chan); unsigned int mite_ack_linkc(struct mite_channel *mite_chan); int mite_done(struct mite_channel *mite_chan); |