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iio: health: max30100: correct FIFO check condition

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Correct issue that the last entry in FIFO was being read twice due
to an incorrect decrement of entry count variable before condition
check.

Signed-off-by: Matt Ranostay <mranostay@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Matt Ranostay 2016-03-25 20:42:58 -07:00 • committed by Jonathan Cameron
parent f7072198f2
commit b74fccad75
1 changed files with 2 additions and 1 deletions
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3
drivers/iio/health/max30100.c
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@ -238,12 +238,13 @@ static irqreturn_t max30100_interrupt_handler(int irq, void *private)
mutex_lock(&data->lock); mutex_lock(&data->lock);
while (cnt-- || (cnt = max30100_fifo_count(data) > 0)) { while (cnt || (cnt = max30100_fifo_count(data) > 0)) {
ret = max30100_read_measurement(data); ret = max30100_read_measurement(data);
if (ret) if (ret)
break; break;
iio_push_to_buffers(data->indio_dev, data->buffer); iio_push_to_buffers(data->indio_dev, data->buffer);
cnt--;
} }
mutex_unlock(&data->lock); mutex_unlock(&data->lock);