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staging: iio: cdc: ad7746: avoid overwrite of num_channels 

commit 04f5b9f539 upstream.

AD7745 devices don't have the CIN2 pins and therefore can't handle related
channels. Forcing the number of AD7746 channels may lead to enabling more
channels than what the hardware actually supports.
Avoid num_channels being overwritten after first assignment.

Signed-off-by: Lucas Stankus <lucas.p.stankus@gmail.com>
Fixes: 83e416f458 ("staging: iio: adc: Replace, rewrite ad7745 from scratch.")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lucas Stankus 2021-05-11 17:54:18 -03:00 committed by Greg Kroah-Hartman
parent 8fff0b5324
commit 3cd5f50827
1 changed files with 0 additions and 1 deletions
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drivers/staging/iio/cdc/ad7746.c
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@ -714,7 +714,6 @@ static int ad7746_probe(struct i2c_client *client,
indio_dev->num_channels = ARRAY_SIZE(ad7746_channels);
else
indio_dev->num_channels = ARRAY_SIZE(ad7746_channels) - 2;
indio_dev->num_channels = ARRAY_SIZE(ad7746_channels);
indio_dev->modes = INDIO_DIRECT_MODE;
if (pdata) {