From 043c998f95036e7fc796b240ab5ba49a8de36df3 Mon Sep 17 00:00:00 2001
From: Mark Brown <broonie@linaro.org>
Date: Fri, 20 Sep 2013 12:32:18 +0100
Subject: [PATCH] regulator: core: Fix return code for invalid parameters

We should be returning an error, a repeated call will never succeed.

Signed-off-by: Mark Brown <broonie@linaro.org>
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