linux-kernel - [PATCH 2/2] regulator: Don't warn on omitted voltage constraints

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Message-Id: <1236702516-30733-2-git-send-email-broonie@opensource.wolfsonmicro.com>
Date:	Tue, 10 Mar 2009 16:28:36 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Liam Girdwood <lrg@...mlogic.co.uk>
Cc:	linux-kernel@...r.kernel.org,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH 2/2] regulator: Don't warn on omitted voltage constraints

Specifying voltage constraints is optional (and only needed if the
consumer is allowed to change the voltage) so don't complain unless
a voltage has been specified.

Also avoid surprises with a dangling else while we're here.

Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
---
 drivers/regulator/core.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 464e9b1..08441e2 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -709,8 +709,12 @@ static int set_machine_constraints(struct regulator_dev *rdev,
 			cmax = INT_MAX;
 		}
 
+		/* voltage constraints are optional */
+		if ((cmin == 0) && (cmax == 0))
+			goto out;
+
 		/* else require explicit machine-level constraints */
-		else if (cmin <= 0 || cmax <= 0 || cmax < cmin) {
+		if (cmin <= 0 || cmax <= 0 || cmax < cmin) {
 			pr_err("%s: %s '%s' voltage constraints\n",
 				       __func__, "invalid", name);
 			ret = -EINVAL;
-- 
1.6.2

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