regulator: Add missing of_node_put()

of_find_node_by_name() returns a node pointer with refcount incremented, use
of_node_put() on it when done.

of_find_node_by_name() will call of_node_put() against from parameter,
thus we also need to call of_node_get(from) before calling
of_find_node_by_name().

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

8 files changed, 26 insertions, 11 deletions

diff --git a/drivers/regulator/88pm8607.c b/drivers/regulator/88pm8607.c
index 2b557119adad..e99a3e48b880 100644
--- a/drivers/regulator/88pm8607.c
+++ b/drivers/regulator/88pm8607.c
@@ -372,7 +372,7 @@ static int pm8607_regulator_dt_init(struct platform_device *pdev,
                                     struct regulator_config *config)
 {
         struct device_node *nproot, *np;
-        nproot = pdev->dev.parent->of_node;
+        nproot = of_node_get(pdev->dev.parent->of_node);
         if (!nproot)
                 return -ENODEV;
         nproot = of_find_node_by_name(nproot, "regulators");
@@ -388,6 +388,7 @@ static int pm8607_regulator_dt_init(struct platform_device *pdev,
                         break;
                 }
         }
+        of_node_put(nproot);
         return 0;
 }
 #else
diff --git a/drivers/regulator/da9052-regulator.c b/drivers/regulator/da9052-regulator.c
index d0963090442d..29d194c8a310 100644
--- a/drivers/regulator/da9052-regulator.c
+++ b/drivers/regulator/da9052-regulator.c
@@ -395,9 +395,9 @@ static int da9052_regulator_probe(struct platform_device *pdev)
                 config.init_data = pdata->regulators[pdev->id];
         } else {
 #ifdef CONFIG_OF
-                struct device_node *nproot = da9052->dev->of_node;
-                struct device_node *np;
+                struct device_node *nproot, *np;
 
+                nproot = of_node_get(da9052->dev->of_node);
                 if (!nproot)
                         return -ENODEV;
 
@@ -414,6 +414,7 @@ static int da9052_regulator_probe(struct platform_device *pdev)
                                 break;
                         }
                 }
+                of_node_put(nproot);
 #endif
         }
 
diff --git a/drivers/regulator/max8907-regulator.c b/drivers/regulator/max8907-regulator.c
index d40cf7fdb546..4568c15fa78d 100644
--- a/drivers/regulator/max8907-regulator.c
+++ b/drivers/regulator/max8907-regulator.c
@@ -224,11 +224,11 @@ static struct of_regulator_match max8907_matches[] = {
 
 static int max8907_regulator_parse_dt(struct platform_device *pdev)
 {
-        struct device_node *np = pdev->dev.parent->of_node;
-        struct device_node *regulators;
+        struct device_node *np, *regulators;
         int ret;
 
-        if (!pdev->dev.parent->of_node)
+        np = of_node_get(pdev->dev.parent->of_node);
+        if (!np)
                 return 0;
 
         regulators = of_find_node_by_name(np, "regulators");
@@ -239,6 +239,7 @@ static int max8907_regulator_parse_dt(struct platform_device *pdev)
 
         ret = of_regulator_match(&pdev->dev, regulators, max8907_matches,
                                  ARRAY_SIZE(max8907_matches));
+        of_node_put(regulators);
         if (ret < 0) {
                 dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
                         ret);
diff --git a/drivers/regulator/max8925-regulator.c b/drivers/regulator/max8925-regulator.c
index 446a85445553..0d5f64a805a0 100644
--- a/drivers/regulator/max8925-regulator.c
+++ b/drivers/regulator/max8925-regulator.c
@@ -252,7 +252,7 @@ static int max8925_regulator_dt_init(struct platform_device *pdev,
 {
         struct device_node *nproot, *np;
         int rcount;
-        nproot = pdev->dev.parent->of_node;
+        nproot = of_node_get(pdev->dev.parent->of_node);
         if (!nproot)
                 return -ENODEV;
         np = of_find_node_by_name(nproot, "regulators");
@@ -263,6 +263,7 @@ static int max8925_regulator_dt_init(struct platform_device *pdev,
 
         rcount = of_regulator_match(&pdev->dev, np,
                                 &max8925_regulator_matches[ridx], 1);
+        of_node_put(np);
         if (rcount < 0)
                 return -ENODEV;
         config->init_data =     max8925_regulator_matches[ridx].init_data;
diff --git a/drivers/regulator/max8997.c b/drivers/regulator/max8997.c
index 836908ce505e..5abd0d3288f0 100644
--- a/drivers/regulator/max8997.c
+++ b/drivers/regulator/max8997.c
@@ -960,7 +960,7 @@ static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev,
         struct max8997_regulator_data *rdata;
         unsigned int i, dvs_voltage_nr = 1, ret;
 
-        pmic_np = iodev->dev->of_node;
+        pmic_np = of_node_get(iodev->dev->of_node);
         if (!pmic_np) {
                 dev_err(&pdev->dev, "could not find pmic sub-node\n");
                 return -ENODEV;
@@ -980,6 +980,7 @@ static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev,
         rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
                                 pdata->num_regulators, GFP_KERNEL);
         if (!rdata) {
+                of_node_put(regulators_np);
                 dev_err(&pdev->dev, "could not allocate memory for regulator data\n");
                 return -ENOMEM;
         }
@@ -1002,6 +1003,7 @@ static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev,
                 rdata->reg_node = reg_np;
                 rdata++;
         }
+        of_node_put(regulators_np);
 
         if (of_get_property(pmic_np, "max8997,pmic-buck1-uses-gpio-dvs", NULL))
                 pdata->buck1_gpiodvs = true;
diff --git a/drivers/regulator/mc13xxx-regulator-core.c b/drivers/regulator/mc13xxx-regulator-core.c
index 2ecf1d8b6a94..5d2ab2ea0c8c 100644
--- a/drivers/regulator/mc13xxx-regulator-core.c
+++ b/drivers/regulator/mc13xxx-regulator-core.c
@@ -175,6 +175,7 @@ int mc13xxx_get_num_regulators_dt(struct platform_device *pdev)
         for_each_child_of_node(parent, child)
                 num++;
 
+        of_node_put(parent);
         return num;
 }
 EXPORT_SYMBOL_GPL(mc13xxx_get_num_regulators_dt);
@@ -197,8 +198,11 @@ struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
 
         data = devm_kzalloc(&pdev->dev, sizeof(*data) * priv->num_regulators,
                             GFP_KERNEL);
-        if (!data)
+        if (!data) {
+                of_node_put(parent);
                 return NULL;
+        }
+
         p = data;
 
         for_each_child_of_node(parent, child) {
@@ -217,6 +221,7 @@ struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
                         }
                 }
         }
+        of_node_put(parent);
 
         *num_parsed = parsed;
         return data;
diff --git a/drivers/regulator/palmas-regulator.c b/drivers/regulator/palmas-regulator.c
index c9e912f583bc..cbaf22627bd3 100644
--- a/drivers/regulator/palmas-regulator.c
+++ b/drivers/regulator/palmas-regulator.c
@@ -527,6 +527,7 @@ static void palmas_dt_to_pdata(struct device *dev,
         u32 prop;
         int idx, ret;
 
+        node = of_node_get(node);
         regulators = of_find_node_by_name(node, "regulators");
         if (!regulators) {
                 dev_info(dev, "regulator node not found\n");
@@ -535,6 +536,7 @@ static void palmas_dt_to_pdata(struct device *dev,
 
         ret = of_regulator_match(dev, regulators, palmas_matches,
                         PALMAS_NUM_REGS);
+        of_node_put(regulators);
         if (ret < 0) {
                 dev_err(dev, "Error parsing regulator init data: %d\n", ret);
                 return;
diff --git a/drivers/regulator/tps65910-regulator.c b/drivers/regulator/tps65910-regulator.c
index b0e4c0bc85c3..6ba6931ac855 100644
--- a/drivers/regulator/tps65910-regulator.c
+++ b/drivers/regulator/tps65910-regulator.c
@@ -964,8 +964,7 @@ static struct tps65910_board *tps65910_parse_dt_reg_data(
 {
         struct tps65910_board *pmic_plat_data;
         struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent);
-        struct device_node *np = pdev->dev.parent->of_node;
-        struct device_node *regulators;
+        struct device_node *np, *regulators;
         struct of_regulator_match *matches;
         unsigned int prop;
         int idx = 0, ret, count;
@@ -978,6 +977,7 @@ static struct tps65910_board *tps65910_parse_dt_reg_data(
                 return NULL;
         }
 
+        np = of_node_get(pdev->dev.parent->of_node);
         regulators = of_find_node_by_name(np, "regulators");
         if (!regulators) {
                 dev_err(&pdev->dev, "regulator node not found\n");
@@ -994,11 +994,13 @@ static struct tps65910_board *tps65910_parse_dt_reg_data(
                 matches = tps65911_matches;
                 break;
         default:
+                of_node_put(regulators);
                 dev_err(&pdev->dev, "Invalid tps chip version\n");
                 return NULL;
         }
 
         ret = of_regulator_match(&pdev->dev, regulators, matches, count);
+        of_node_put(regulators);
         if (ret < 0) {
                 dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
                         ret);