diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 56f4ca0854c9..6437949849b0 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -116,7 +116,7 @@ static const char *rdev_get_name(struct regulator_dev *rdev)
  * @supply: regulator supply name
  *
  * Extract the regulator device node corresponding to the supply name.
- * retruns the device node corresponding to the regulator if found, else
+ * returns the device node corresponding to the regulator if found, else
  * returns NULL.
  */
 static struct device_node *of_get_regulator(struct device *dev, const char *supply)
@@ -1229,7 +1229,7 @@ static struct regulator *_regulator_get(struct device *dev, const char *id,
 	struct regulator_dev *rdev;
 	struct regulator *regulator = ERR_PTR(-EPROBE_DEFER);
 	const char *devname = NULL;
-	int ret;
+	int ret = 0;
 
 	if (id == NULL) {
 		pr_err("get() with no identifier\n");
@@ -1245,6 +1245,15 @@ static struct regulator *_regulator_get(struct device *dev, const char *id,
 	if (rdev)
 		goto found;
 
+	/*
+	 * If we have return value from dev_lookup fail, we do not expect to
+	 * succeed, so, quit with appropriate error value
+	 */
+	if (ret) {
+		regulator = ERR_PTR(ret);
+		goto out;
+	}
+
 	if (board_wants_dummy_regulator) {
 		rdev = dummy_regulator_rdev;
 		goto found;
@@ -3512,7 +3521,14 @@ regulator_register(const struct regulator_desc *regulator_desc,
 
 		r = regulator_dev_lookup(dev, supply, &ret);
 
-		if (!r) {
+		if (ret == -ENODEV) {
+			/*
+			 * No supply was specified for this regulator and
+			 * there will never be one.
+			 */
+			ret = 0;
+			goto add_dev;
+		} else if (!r) {
 			dev_err(dev, "Failed to find supply %s\n", supply);
 			ret = -EPROBE_DEFER;
 			goto scrub;
@@ -3530,6 +3546,7 @@ regulator_register(const struct regulator_desc *regulator_desc,
 		}
 	}
 
+add_dev:
 	/* add consumers devices */
 	if (init_data) {
 		for (i = 0; i < init_data->num_consumer_supplies; i++) {
diff --git a/drivers/regulator/max1586.c b/drivers/regulator/max1586.c
index 8c5a54f541b5..6b2217b404b2 100644
--- a/drivers/regulator/max1586.c
+++ b/drivers/regulator/max1586.c
@@ -232,8 +232,7 @@ static int max1586_pmic_remove(struct i2c_client *client)
 	int i;
 
 	for (i = 0; i <= MAX1586_V6; i++)
-		if (max1586->rdev[i])
-			regulator_unregister(max1586->rdev[i]);
+		regulator_unregister(max1586->rdev[i]);
 	return 0;
 }
 
diff --git a/drivers/regulator/max8649.c b/drivers/regulator/max8649.c
index 3ca14380f22d..f44427003611 100644
--- a/drivers/regulator/max8649.c
+++ b/drivers/regulator/max8649.c
@@ -275,10 +275,8 @@ static int max8649_regulator_remove(struct i2c_client *client)
 {
 	struct max8649_regulator_info *info = i2c_get_clientdata(client);
 
-	if (info) {
-		if (info->regulator)
-			regulator_unregister(info->regulator);
-	}
+	if (info)
+		regulator_unregister(info->regulator);
 
 	return 0;
 }
diff --git a/drivers/regulator/max8660.c b/drivers/regulator/max8660.c
index 4d7c635c36c2..d428ef9a626f 100644
--- a/drivers/regulator/max8660.c
+++ b/drivers/regulator/max8660.c
@@ -426,8 +426,7 @@ static int max8660_remove(struct i2c_client *client)
 	int i;
 
 	for (i = 0; i < MAX8660_V_END; i++)
-		if (max8660->rdev[i])
-			regulator_unregister(max8660->rdev[i]);
+		regulator_unregister(max8660->rdev[i]);
 	return 0;
 }
 
diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
index 8a831947c351..2dd74e254397 100644
--- a/drivers/regulator/s5m8767.c
+++ b/drivers/regulator/s5m8767.c
@@ -923,8 +923,7 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
 	return 0;
 err:
 	for (i = 0; i < s5m8767->num_regulators; i++)
-		if (rdev[i])
-			regulator_unregister(rdev[i]);
+		regulator_unregister(rdev[i]);
 
 	return ret;
 }
@@ -936,8 +935,7 @@ static int s5m8767_pmic_remove(struct platform_device *pdev)
 	int i;
 
 	for (i = 0; i < s5m8767->num_regulators; i++)
-		if (rdev[i])
-			regulator_unregister(rdev[i]);
+		regulator_unregister(rdev[i]);
 
 	return 0;
 }
diff --git a/drivers/regulator/tps6524x-regulator.c b/drivers/regulator/tps6524x-regulator.c
index 18b67d28d60b..1094393155ed 100644
--- a/drivers/regulator/tps6524x-regulator.c
+++ b/drivers/regulator/tps6524x-regulator.c
@@ -585,8 +585,7 @@ static int pmic_remove(struct spi_device *spi)
 	if (!hw)
 		return 0;
 	for (i = 0; i < N_REGULATORS; i++) {
-		if (hw->rdev[i])
-			regulator_unregister(hw->rdev[i]);
+		regulator_unregister(hw->rdev[i]);
 		hw->rdev[i] = NULL;
 	}
 	spi_set_drvdata(spi, NULL);
diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index 7bc732ce6e50..145022a83085 100644
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -141,18 +141,18 @@ void regulator_put(struct regulator *regulator);
 void devm_regulator_put(struct regulator *regulator);
 
 /* regulator output control and status */
-int regulator_enable(struct regulator *regulator);
+int __must_check regulator_enable(struct regulator *regulator);
 int regulator_disable(struct regulator *regulator);
 int regulator_force_disable(struct regulator *regulator);
 int regulator_is_enabled(struct regulator *regulator);
 int regulator_disable_deferred(struct regulator *regulator, int ms);
 
-int regulator_bulk_get(struct device *dev, int num_consumers,
-		       struct regulator_bulk_data *consumers);
-int devm_regulator_bulk_get(struct device *dev, int num_consumers,
-			    struct regulator_bulk_data *consumers);
-int regulator_bulk_enable(int num_consumers,
-			  struct regulator_bulk_data *consumers);
+int __must_check regulator_bulk_get(struct device *dev, int num_consumers,
+				    struct regulator_bulk_data *consumers);
+int __must_check devm_regulator_bulk_get(struct device *dev, int num_consumers,
+					 struct regulator_bulk_data *consumers);
+int __must_check regulator_bulk_enable(int num_consumers,
+				       struct regulator_bulk_data *consumers);
 int regulator_bulk_disable(int num_consumers,
 			   struct regulator_bulk_data *consumers);
 int regulator_bulk_force_disable(int num_consumers,