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>
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@ -512,7 +512,7 @@ static void pcmmio_stop_intr(struct comedi_device *dev,
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subpriv->dio.intr.enabled_mask = 0;
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subpriv->dio.intr.active = 0;
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s->async->inttrig = 0;
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s->async->inttrig = NULL;
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nports = subpriv->dio.intr.num_asic_chans / CHANS_PER_PORT;
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firstport = subpriv->dio.intr.asic_chan / CHANS_PER_PORT;
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switch_page(dev, asic, PAGE_ENAB);
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@ -778,7 +778,7 @@ pcmmio_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice *s,
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return -EINVAL;
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spin_lock_irqsave(&subpriv->dio.intr.spinlock, flags);
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s->async->inttrig = 0;
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s->async->inttrig = NULL;
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if (subpriv->dio.intr.active)
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event = pcmmio_start_intr(dev, s);
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spin_unlock_irqrestore(&subpriv->dio.intr.spinlock, flags);
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