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staging: comedi: me4000: absorb ai_prepare() 

This function never fails and it's only called by me4000_ai_do_cmd().

Absorb it and remove the unnecessary failure check.

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 2015-08-05 10:45:07 -07:00 committed by Greg Kroah-Hartman
parent 272e426ebc
commit 11e480c3a6
1 changed files with 9 additions and 22 deletions
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31
drivers/staging/comedi/drivers/me4000.c
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@ -681,12 +681,18 @@ static int me4000_ai_write_chanlist(struct comedi_device *dev,
return 0;
}
static int ai_prepare(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_cmd *cmd)
static int me4000_ai_do_cmd(struct comedi_device *dev,
struct comedi_subdevice *s)
{
struct me4000_private *devpriv = dev->private;
struct comedi_cmd *cmd = &s->async->cmd;
unsigned int ctrl;
int err;
/* Reset the analog input */
err = me4000_ai_cancel(dev, s);
if (err)
return err;
/* Write timer arguments */
ai_write_timer(dev);
@ -718,25 +724,6 @@ static int ai_prepare(struct comedi_device *dev,
/* Write the channel list */
me4000_ai_write_chanlist(dev, s, cmd);
return 0;
}
static int me4000_ai_do_cmd(struct comedi_device *dev,
struct comedi_subdevice *s)
{
int err;
struct comedi_cmd *cmd = &s->async->cmd;
/* Reset the analog input */
err = me4000_ai_cancel(dev, s);
if (err)
return err;
/* Prepare the AI for acquisition */
err = ai_prepare(dev, s, cmd);
if (err)
return err;
/* Start acquistion by dummy read */
inl(dev->iobase + ME4000_AI_START_REG);