The comedi core validates that all the data values are <= s->maxdata
before calling the (*insn_write) function. The extra masking is not
needed. Remove it.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/mf6x4.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/comedi/drivers/mf6x4.c
b/drivers/staging/comedi/drivers/mf6x4.c
index 464f4b4..6657055 100644
--- a/drivers/staging/comedi/drivers/mf6x4.c
+++ b/drivers/staging/comedi/drivers/mf6x4.c
@@ -58,7 +58,6 @@
#define MF6X4_DA7_R 0x2e
/* Map DAC cahnnel id to real HW-dependent offset value */
#define MF6X4_DAC_R(x) (0x20 + ((x) * 2))
-#define MF6X4_DA_M 0x3fff
/* BAR2 registers */
#define MF634_GPIOC_R 0x68
@@ -182,6 +181,7 @@ static int mf6x4_ao_insn_write(struct comedi_device *dev,
{
struct mf6x4_private *devpriv = dev->private;
unsigned int chan = CR_CHAN(insn->chanspec);
+ unsigned int val = devpriv->ao_readback[chan];
uint32_t gpioc;
int i;
@@ -191,10 +191,10 @@ static int mf6x4_ao_insn_write(struct comedi_device *dev,
devpriv->gpioc_R);
for (i = 0; i < insn->n; i++) {
- iowrite16(data[i] & MF6X4_DA_M, dev->mmio + MF6X4_DAC_R(chan));
-
- devpriv->ao_readback[chan] = data[i];
+ val = data[i];
+ iowrite16(val, dev->mmio + MF6X4_DAC_R(chan));
}
+ devpriv->ao_readback[chan] = val;
return insn->n;
}
--
2.0.3
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