regulator_get_voltage() may return negative error code.
Add error checking to avoid setting error code to voltage_uv.

Signed-off-by: Axel Lin <axel....@ingics.com>
---
 drivers/iio/dac/ad5624r_spi.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/dac/ad5624r_spi.c b/drivers/iio/dac/ad5624r_spi.c
index 6a7d6a4..ae7fb64 100644
--- a/drivers/iio/dac/ad5624r_spi.c
+++ b/drivers/iio/dac/ad5624r_spi.c
@@ -238,7 +238,11 @@ static int __devinit ad5624r_probe(struct spi_device *spi)
                if (ret)
                        goto error_put_reg;
 
-               voltage_uv = regulator_get_voltage(st->reg);
+               ret = regulator_get_voltage(st->reg);
+               if (ret)
+                       goto error_disable_reg;
+
+               voltage_uv = ret;
        }
 
        spi_set_drvdata(spi, indio_dev);
-- 
1.7.9.5



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