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Commit c3c17d2e authored by H Hartley Sweeten's avatar H Hartley Sweeten Committed by Greg Kroah-Hartman
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staging: comedi: ii_pci20kc: save unmunged data for ao readback 



The unmunged data should be saved for readback not the munged data.

Signed-off-by: default avatarH Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: default avatarIan Abbott <abbotti@mev.co.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 42c7b55c

drivers/staging/comedi/drivers/ii_pci20kc.c

+3 −3
Original line number Diff line number Diff line
@@ -165,12 +165,14 @@ static int ii20k_ao_insn_write(struct comedi_device *dev, 
	struct ii20k_ao_private *ao_spriv = s->private;

	void __iomem *iobase = ii20k_module_iobase(dev, s);

	unsigned int chan = CR_CHAN(insn->chanspec);

	unsigned int val = ao_spriv->last_data[chan];

	unsigned int val;

	int i;



	for (i = 0; i < insn->n; i++) {

		val = data[i];



		ao_spriv->last_data[chan] = val;



		/* munge data */

		val += ((s->maxdata + 1) >> 1);

		val &= s->maxdata;
@@ -180,8 +182,6 @@ static int ii20k_ao_insn_write(struct comedi_device *dev, 
		writeb(0x00, iobase + II20K_AO_STRB_REG(chan));

	}



	ao_spriv->last_data[chan] = val;



	return insn->n;

}