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iio: adc: ad7266: Don't set error code to st->vref_uv 

regulator_get_voltage() may return negative error code.
Add error checking to avoid setting error code to st->vref_uv.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Axel Lin 2012-12-14 07:47:00 +00:00 committed by Jonathan Cameron
parent 9541cc39a6
commit 36ce0c1c3a
1 changed files with 5 additions and 1 deletions
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6
drivers/iio/adc/ad7266.c
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@ -411,7 +411,11 @@ static int __devinit ad7266_probe(struct spi_device *spi)
if (ret)
goto error_put_reg;
st->vref_uv = regulator_get_voltage(st->reg);
ret = regulator_get_voltage(st->reg);
if (ret < 0)
goto error_disable_reg;
st->vref_uv = ret;
} else {
/* Use internal reference */
st->vref_uv = 2500000;