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staging: comedi: pcmmio: quiet NULL pointer sparse noise 

The comedi_async 'inttrig' member is a pointer to a callback
function. NULL should be used to clear it not 0.

This quiets a number of sparse warnings about:

Warning: Using plain integer as NULL pointer

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2012-06-18 17:03:17 -07:00 committed by Greg Kroah-Hartman
parent d163a19d91
commit 76728a93a7
1 changed files with 2 additions and 2 deletions
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4
drivers/staging/comedi/drivers/pcmmio.c
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@ -512,7 +512,7 @@ static void pcmmio_stop_intr(struct comedi_device *dev,
subpriv->dio.intr.enabled_mask = 0;
subpriv->dio.intr.active = 0;
s->async->inttrig = 0;
s->async->inttrig = NULL;
nports = subpriv->dio.intr.num_asic_chans / CHANS_PER_PORT;
firstport = subpriv->dio.intr.asic_chan / CHANS_PER_PORT;
switch_page(dev, asic, PAGE_ENAB);
@ -778,7 +778,7 @@ pcmmio_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice *s,
return -EINVAL;
spin_lock_irqsave(&subpriv->dio.intr.spinlock, flags);
s->async->inttrig = 0;
s->async->inttrig = NULL;
if (subpriv->dio.intr.active)
event = pcmmio_start_intr(dev, s);
spin_unlock_irqrestore(&subpriv->dio.intr.spinlock, flags);