openwrt/target/linux/sunxi/patches-3.13/124-regulator-dont-print-error-when-no-regulator-found.patch

From 820a121fdef79cc1293e6fee2fbe8156d9e8a75a Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Wed, 11 Dec 2013 15:07:52 +0100
Subject: [PATCH] regulator_get_optional: don't print an error when no
 regulator is found

Only print an error when _regulator_get() is expected to return a valid
regulator, that is when _regulator_get() is called from regulator_get() and
we're not using the dummy because we don't have full-constraints, or when
_regulator_get() is called from regulator_get_exclusive() in which case
returning a dummy is not allowed.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/regulator/core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1351,7 +1351,8 @@ static struct regulator *_regulator_get(
 
 		rdev = dummy_regulator_rdev;
 		goto found;
-	} else {
+	/* Don't log an error when called from regulator_get_optional() */
+	} else if (!have_full_constraints() || exclusive) {
 		dev_err(dev, "dummy supplies not allowed\n");
 	}