From 36ce0c1c3ab7ea54fa6c2b3a0803c7ab0adcefbf Mon Sep 17 00:00:00 2001
From: Axel Lin <axel.lin@ingics.com>
Date: Fri, 14 Dec 2012 07:47:00 +0000
Subject: [PATCH] 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>
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