From: Tim Kryger <tim.kryger@linaro.org>
Date: Thu, 17 Apr 2014 18:55:24 +0000 (-0700)
Subject: regulator: core: Return error in get optional stub
X-Git-Tag: omap-for-v3.16/pm-signed~55^2~1^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=df7926fffa9a4c0bceb0189386b4c5edc012fcbb;p=pandora-kernel.git

regulator: core: Return error in get optional stub

Drivers that call regulator_get_optional are tolerant to the absence of
that regulator.  By modifying the value returned from the stub function
to match that seen when a regulator isn't present, callers can wrap the
regulator logic with an IS_ERR based conditional even if they happen to
call regulator_is_supported_voltage.  This improves efficiency as well
as eliminates the possibility for a very subtle bug.

Signed-off-by: Tim Kryger <tim.kryger@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
---

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