Commit d02e0f8f authored Mar 30, 2015 by Vianney le Clément de Saint-Marcq Committed by Jonathan Cameron Apr 09, 2015

iio: mlx90614: Check for errors in read values

The device uses the MSB of the returned temperature value as an error
flag. Return a read error when this bit is set.

Signed-off-by: Vianney le Clément de Saint-Marcq <vianney.leclement@essensium.com>
Cc: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

parent eb4b07da

drivers/iio/temperature/mlx90614.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -196,6 +196,11 @@ static int mlx90614_read_raw(struct iio_dev *indio_dev,

		if (ret < 0)
		return ret;

		/* MSB is an error flag */
		if (ret & 0x8000)
		return -EIO;

		*val = ret;
		return IIO_VAL_INT;
		case IIO_CHAN_INFO_OFFSET: