linux-kernel - [PATCH 2/6] iio: dac: ad5380: Don't set error code to st->vref

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Date:	Fri, 14 Dec 2012 15:48:44 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Jonathan Cameron <jic23@....ac.uk>
Cc:	Lars-Peter Clausen <lars@...afoo.de>, linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/6] iio: dac: ad5380: Don't set error code to st->vref

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@...ics.com>
---
 drivers/iio/dac/ad5380.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/dac/ad5380.c b/drivers/iio/dac/ad5380.c
index 14991ac..4aca189 100644
--- a/drivers/iio/dac/ad5380.c
+++ b/drivers/iio/dac/ad5380.c
@@ -406,7 +406,11 @@ static int __devinit ad5380_probe(struct device *dev, struct regmap *regmap,
 			goto error_free_reg;
 		}
 
-		st->vref = regulator_get_voltage(st->vref_reg);
+		ret = regulator_get_voltage(st->vref_reg);
+		if (ret < 0)
+			goto error_disable_reg;
+
+		st->vref = ret;
 	} else {
 		st->vref = st->chip_info->int_vref;
 		ctrl |= AD5380_CTRL_INT_VREF_EN;
-- 
1.7.9.5



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