[alsa-devel] [PATCH v2 2/8] regulator: arizona-ldo1: Avoid potential memory leak reading init_data

[Charles Keepax]

The device argument passed to of_get_regulator_init_data is used to
do some devres memory allocation. Currently the driver passes the MFD
device pointer to this function, this could result in the init_data
allocation being leaked if the regulator is unbound but the MFD isn't.

Correct this issue by correctly passing the local platform device.

Signed-off-by: Charles Keepax <ckeepax at opensource.wolfsonmicro.com>
---

New patch in the series since v1.

 drivers/regulator/arizona-ldo1.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/regulator/arizona-ldo1.c b/drivers/regulator/arizona-ldo1.c
index e76d094..b726fa1 100644
--- a/drivers/regulator/arizona-ldo1.c
+++ b/drivers/regulator/arizona-ldo1.c
@@ -186,7 +186,8 @@ static const struct regulator_init_data arizona_ldo1_wm5110 = {
 	.num_consumer_supplies = 1,
 };
 
-static int arizona_ldo1_of_get_pdata(struct arizona *arizona,
+static int arizona_ldo1_of_get_pdata(struct device *dev,
+				     struct arizona *arizona,
 				     struct regulator_config *config,
 				     const struct regulator_desc *desc)
 {
@@ -212,8 +213,7 @@ static int arizona_ldo1_of_get_pdata(struct arizona *arizona,
 	if (init_node) {
 		config->of_node = init_node;
 
-		init_data = of_get_regulator_init_data(arizona->dev, init_node,
-						       desc);
+		init_data = of_get_regulator_init_data(dev, init_node, desc);
 
 		if (init_data) {
 			init_data->consumer_supplies = &ldo1->supply;
@@ -283,7 +283,8 @@ static int arizona_ldo1_probe(struct platform_device *pdev)
 
 	if (IS_ENABLED(CONFIG_OF)) {
 		if (!dev_get_platdata(arizona->dev)) {
-			ret = arizona_ldo1_of_get_pdata(arizona, &config, desc);
+			ret = arizona_ldo1_of_get_pdata(&pdev->dev, arizona,
+							&config, desc);
 			if (ret < 0)
 				return ret;
 		}
-- 
2.1.4