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@@ -411,15 +411,18 @@ static void das16m1_handler(struct comedi_device *dev, unsigned int status)
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hw_counter = comedi_8254_read(devpriv->counter, 1);
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/* make sure hardware counter reading is not bogus due to initial value
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* not having been loaded yet */
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- if (devpriv->adc_count == 0 && hw_counter == devpriv->initial_hw_count) {
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+ if (devpriv->adc_count == 0 &&
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+ hw_counter == devpriv->initial_hw_count) {
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num_samples = 0;
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} else {
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- /* The calculation of num_samples looks odd, but it uses the following facts.
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- * 16 bit hardware counter is initialized with value of zero (which really
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- * means 0x1000). The counter decrements by one on each conversion
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- * (when the counter decrements from zero it goes to 0xffff). num_samples
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- * is a 16 bit variable, so it will roll over in a similar fashion to the
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- * hardware counter. Work it out, and this is what you get. */
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+ /* The calculation of num_samples looks odd, but it uses the
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+ * following facts. 16 bit hardware counter is initialized with
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+ * value of zero (which really means 0x1000). The counter
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+ * decrements by one on each conversion (when the counter
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+ * decrements from zero it goes to 0xffff). num_samples is a
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+ * 16 bit variable, so it will roll over in a similar fashion
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+ * to the hardware counter. Work it out, and this is what you
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+ * get. */
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num_samples = -hw_counter - devpriv->adc_count;
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}
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/* check if we only need some of the points */
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