staging: comedi: adl_pci9118: remove 'ai_buf_ptr' from private data

This member of the private data is set to 0 but never used. Remove it.
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>

drivers/staging/comedi/drivers/adl_pci9118.c

@@ -324,7 +324,6 @@ struct pci9118_private {
 	char ai_neverending;		/* we do unlimited AI */
 	unsigned int ai_do;		/* what do AI? 0=nothing, 1 to 4 mode */
 	unsigned int ai_act_scan;	/* how many scans we finished */
-	unsigned int ai_buf_ptr;	/* data buffer ptr in samples */
 	unsigned int ai_n_realscanlen;	/*
 					 * what we must transfer for one
 					 * outgoing scan include front/back adds
@@ -875,7 +874,6 @@ static int pci9118_ai_cancel(struct comedi_device *dev,
 	devpriv->ai_act_dmapos = 0;
 	s->async->cur_chan = 0;
 	s->async->inttrig = NULL;
-	devpriv->ai_buf_ptr = 0;
 	devpriv->ai_neverending = 0;
 	devpriv->dma_actbuf = 0;
 
@@ -1797,7 +1795,6 @@ static int pci9118_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 	devpriv->ai_act_scan = 0;
 	devpriv->ai_act_dmapos = 0;
 	s->async->cur_chan = 0;
-	devpriv->ai_buf_ptr = 0;
 
 	if (devpriv->usedma)
 		ret = pci9118_ai_docmd_dma(dev, s);