linux-kernel - [PATCH v3 2/4] regulator: core: Add destroy

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Message-Id: <20200716042053.1927676-3-saravanak@google.com>
Date:   Wed, 15 Jul 2020 21:20:51 -0700
From:   Saravana Kannan <saravanak@...gle.com>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Saravana Kannan <saravanak@...gle.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        John Stultz <john.stultz@...aro.org>,
        linux-kernel@...r.kernel.org, kernel-team@...roid.com
Subject: [PATCH v3 2/4] regulator: core: Add destroy_regulator()

Part of the regulator_get() code is already factored out into
create_regulator(). This patch factors out some of the regulator_put()
code into destroy_regulator() so that create_regulator() has a
corresponding unwind function. Subsequent patches will use this
function.

Signed-off-by: Saravana Kannan <saravanak@...gle.com>
---
 drivers/regulator/core.c | 34 +++++++++++++++++++++-------------
 1 file changed, 21 insertions(+), 13 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 03154f5b939f..c9615d3530c7 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -105,6 +105,7 @@ static int regulator_balance_voltage(struct regulator_dev *rdev,
 static struct regulator *create_regulator(struct regulator_dev *rdev,
 					  struct device *dev,
 					  const char *supply_name);
+static void destroy_regulator(struct regulator *regulator);
 static void _regulator_put(struct regulator *regulator);
 
 const char *rdev_get_name(struct regulator_dev *rdev)
@@ -2034,20 +2035,9 @@ struct regulator *regulator_get_optional(struct device *dev, const char *id)
 }
 EXPORT_SYMBOL_GPL(regulator_get_optional);
 
-/* regulator_list_mutex lock held by regulator_put() */
-static void _regulator_put(struct regulator *regulator)
+static void destroy_regulator(struct regulator *regulator)
 {
-	struct regulator_dev *rdev;
-
-	if (IS_ERR_OR_NULL(regulator))
-		return;
-
-	lockdep_assert_held_once(&regulator_list_mutex);
-
-	/* Docs say you must disable before calling regulator_put() */
-	WARN_ON(regulator->enable_count);
-
-	rdev = regulator->rdev;
+	struct regulator_dev *rdev = regulator->rdev;
 
 	debugfs_remove_recursive(regulator->debugfs);
 
@@ -2068,6 +2058,24 @@ static void _regulator_put(struct regulator *regulator)
 
 	kfree_const(regulator->supply_name);
 	kfree(regulator);
+}
+
+/* regulator_list_mutex lock held by regulator_put() */
+static void _regulator_put(struct regulator *regulator)
+{
+	struct regulator_dev *rdev;
+
+	if (IS_ERR_OR_NULL(regulator))
+		return;
+
+	lockdep_assert_held_once(&regulator_list_mutex);
+
+	/* Docs say you must disable before calling regulator_put() */
+	WARN_ON(regulator->enable_count);
+
+	rdev = regulator->rdev;
+
+	destroy_regulator(regulator);
 
 	module_put(rdev->owner);
 	put_device(&rdev->dev);
-- 
2.28.0.rc0.105.gf9edc3c819-goog