Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / drivers / iio / adc / ad7266.c

diff --git a/kernel/drivers/iio/adc/ad7266.c b/kernel/drivers/iio/adc/ad7266.c
index 21e19b6..2123f0a 100644 (file)
--- a/kernel/drivers/iio/adc/ad7266.c
+++ b/kernel/drivers/iio/adc/ad7266.c
@@ -396,8 +396,8 @@ static int ad7266_probe(struct spi_device *spi)
 
        st = iio_priv(indio_dev);
 
-       st->reg = devm_regulator_get(&spi->dev, "vref");
-       if (!IS_ERR_OR_NULL(st->reg)) {
+       st->reg = devm_regulator_get_optional(&spi->dev, "vref");
+       if (!IS_ERR(st->reg)) {
                ret = regulator_enable(st->reg);
                if (ret)
                        return ret;
@@ -408,6 +408,9 @@ static int ad7266_probe(struct spi_device *spi)
 
                st->vref_mv = ret / 1000;
        } else {
+               /* Any other error indicates that the regulator does exist */
+               if (PTR_ERR(st->reg) != -ENODEV)
+                       return PTR_ERR(st->reg);
                /* Use internal reference */
                st->vref_mv = 2500;
        }