staging: comedi: me4000: remove 'chan' check in me4000_ai_insn_read()
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>
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@ -477,11 +477,6 @@ static int me4000_ai_insn_read(struct comedi_device *dev,
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switch (aref) {
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case AREF_GROUND:
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case AREF_COMMON:
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if (chan >= board->ai_nchan) {
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dev_err(dev->class_dev,
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"Analog input is not available\n");
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return -EINVAL;
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}
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entry |= ME4000_AI_LIST_INPUT_SINGLE_ENDED | chan;
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break;
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