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@google.com>
Link: https://lore.kernel.org/r/20200716042053.1927676-3-saravanak@google.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 538a277..196e344 100644 (file)
--- 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);