From 8bd48c9ef1f1af96dc699e67a8dc985046e6f22b Mon Sep 17 00:00:00 2001 From: Ian Abbott Date: Fri, 4 Jan 2013 11:33:24 +0000 Subject: [PATCH] staging: comedi: comedi_test: make samples unsigned Represent the fake samples as unsigned shorts instead of signed shorts, as this is the usual Comedi convention. There is no change to the actual binary representation, although the `cfc_write_to_buffer()` call currently expects a signed short for some bizarre reason. Signed-off-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/comedi_test.c | 21 ++++++++++++--------- 1 file changed, 12 insertions(+), 9 deletions(-) diff --git a/drivers/staging/comedi/drivers/comedi_test.c b/drivers/staging/comedi/drivers/comedi_test.c index 48255b3..ce13fbc 100644 --- a/drivers/staging/comedi/drivers/comedi_test.c +++ b/drivers/staging/comedi/drivers/comedi_test.c @@ -85,8 +85,9 @@ static const struct comedi_lrange waveform_ai_ranges = { } }; -static short fake_sawtooth(struct comedi_device *dev, unsigned int range_index, - unsigned long current_time) +static unsigned short fake_sawtooth(struct comedi_device *dev, + unsigned int range_index, + unsigned long current_time) { struct waveform_private *devpriv = dev->private; struct comedi_subdevice *s = dev->read_subdev; @@ -109,9 +110,9 @@ static short fake_sawtooth(struct comedi_device *dev, unsigned int range_index, return offset + value; } -static short fake_squarewave(struct comedi_device *dev, - unsigned int range_index, - unsigned long current_time) +static unsigned short fake_squarewave(struct comedi_device *dev, + unsigned int range_index, + unsigned long current_time) { struct waveform_private *devpriv = dev->private; struct comedi_subdevice *s = dev->read_subdev; @@ -131,15 +132,17 @@ static short fake_squarewave(struct comedi_device *dev, return offset + value; } -static short fake_flatline(struct comedi_device *dev, unsigned int range_index, - unsigned long current_time) +static unsigned short fake_flatline(struct comedi_device *dev, + unsigned int range_index, + unsigned long current_time) { return dev->read_subdev->maxdata / 2; } /* generates a different waveform depending on what channel is read */ -static short fake_waveform(struct comedi_device *dev, unsigned int channel, - unsigned int range, unsigned long current_time) +static unsigned short fake_waveform(struct comedi_device *dev, + unsigned int channel, unsigned int range, + unsigned long current_time) { enum { SAWTOOTH_CHAN, -- 2.7.4