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staging: comedi: me4000: remove 'chan' check in me4000_ai_insn_read()

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The comedi core validates that the 'chan' is valid for the subdevice
before calling the (*insn_read) operation. Remove the unnecessary check.

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>
This commit is contained in:
H Hartley Sweeten 2015-08-05 10:44:41 -07:00 committed by Greg Kroah-Hartman
parent 31bebc030f
commit 03611e5491
1 changed files with 0 additions and 5 deletions
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5
drivers/staging/comedi/drivers/me4000.c
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@ -477,11 +477,6 @@ static int me4000_ai_insn_read(struct comedi_device *dev,
switch (aref) {
case AREF_GROUND:
case AREF_COMMON:
if (chan >= board->ai_nchan) {
dev_err(dev->class_dev,
"Analog input is not available\n");
return -EINVAL;
}
entry |= ME4000_AI_LIST_INPUT_SINGLE_ENDED | chan;
break;