[PATCH 1/3] regulator: max77650: fix OF node reference imbalance

[PATCH 1/3] regulator: max77650: fix OF node reference imbalance

[Johan Hovold]

The driver reuses the OF node of the parent multi-function device but
fails to take another reference to balance the one dropped by the
platform bus code when unbinding the MFD and deregistering the child
devices.

Fix this by using the intended helper for reusing OF nodes.

Fixes: bcc61f1c44fd ("regulator: max77650: add regulator support")
Cc: stable@vger.kernel.org	# 5.1
Cc: Bartosz Golaszewski <brgl@kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/regulator/max77650-regulator.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/max77650-regulator.c b/drivers/regulator/max77650-regulator.c
index a809264c77fc..11b04a13f889 100644
--- a/drivers/regulator/max77650-regulator.c
+++ b/drivers/regulator/max77650-regulator.c
@@ -337,7 +337,7 @@ static int max77650_regulator_probe(struct platform_device *pdev)
 	parent = dev->parent;
 
 	if (!dev->of_node)
-		dev->of_node = parent->of_node;
+		device_set_of_node_from_dev(dev, parent);
 
 	rdescs = devm_kcalloc(dev, MAX77650_REGULATOR_NUM_REGULATORS,
 			      sizeof(*rdescs), GFP_KERNEL);
-- 
2.52.0

[PATCH 2/3] regulator: mt6357: fix OF node reference imbalance

[Johan Hovold]

The driver reuses the OF node of the parent multi-function device but
fails to take another reference to balance the one dropped by the
platform bus code when unbinding the MFD and deregistering the child
devices.

Fix this by using the intended helper for reusing OF nodes.

Fixes: dafc7cde23dc ("regulator: add mt6357 regulator")
Cc: stable@vger.kernel.org	# 6.2
Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/regulator/mt6357-regulator.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/mt6357-regulator.c b/drivers/regulator/mt6357-regulator.c
index 1eb69c7a6acb..09feb454ab6b 100644
--- a/drivers/regulator/mt6357-regulator.c
+++ b/drivers/regulator/mt6357-regulator.c
@@ -410,7 +410,7 @@ static int mt6357_regulator_probe(struct platform_device *pdev)
 	struct regulator_dev *rdev;
 	int i;
 
-	pdev->dev.of_node = pdev->dev.parent->of_node;
+	device_set_of_node_from_dev(&pdev->dev, pdev->dev.parent);
 
 	for (i = 0; i < MT6357_MAX_REGULATOR; i++) {
 		config.dev = &pdev->dev;
-- 
2.52.0

[PATCH 3/3] regulator: s2dos05: fix OF node reference imbalance

[Johan Hovold]

The driver reuses the OF node of the parent multi-function device but
fails to take another reference to balance the one dropped by the
platform bus code when unbinding the MFD and deregistering the child
devices.

Fix this by using the intended helper for reusing OF nodes.

Fixes: bb2441402392 ("regulator: add s2dos05 regulator support")
Cc: stable@vger.kernel.org	# 6.18
Cc: Dzmitry Sankouski <dsankouski@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/regulator/s2dos05-regulator.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/s2dos05-regulator.c b/drivers/regulator/s2dos05-regulator.c
index 1463585c4565..a1c394ddbaff 100644
--- a/drivers/regulator/s2dos05-regulator.c
+++ b/drivers/regulator/s2dos05-regulator.c
@@ -126,7 +126,7 @@ static int s2dos05_pmic_probe(struct platform_device *pdev)
 	s2dos05->regmap = iodev->regmap_pmic;
 	s2dos05->dev = dev;
 	if (!dev->of_node)
-		dev->of_node = dev->parent->of_node;
+		device_set_of_node_from_dev(dev, dev->parent);
 
 	config.dev = dev;
 	config.driver_data = s2dos05;
-- 
2.52.0

Re: [PATCH 1/3] regulator: max77650: fix OF node reference imbalance

[Bartosz Golaszewski]

On Tue, 7 Apr 2026 14:20:29 +0200, Johan Hovold <johan@kernel.org> said:
> The driver reuses the OF node of the parent multi-function device but
> fails to take another reference to balance the one dropped by the
> platform bus code when unbinding the MFD and deregistering the child
> devices.
>
> Fix this by using the intended helper for reusing OF nodes.
>
> Fixes: bcc61f1c44fd ("regulator: max77650: add regulator support")
> Cc: stable@vger.kernel.org	# 5.1
> Cc: Bartosz Golaszewski <brgl@kernel.org>
> Signed-off-by: Johan Hovold <johan@kernel.org>
> ---
>  drivers/regulator/max77650-regulator.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/regulator/max77650-regulator.c b/drivers/regulator/max77650-regulator.c
> index a809264c77fc..11b04a13f889 100644
> --- a/drivers/regulator/max77650-regulator.c
> +++ b/drivers/regulator/max77650-regulator.c
> @@ -337,7 +337,7 @@ static int max77650_regulator_probe(struct platform_device *pdev)
>  	parent = dev->parent;
>
>  	if (!dev->of_node)
> -		dev->of_node = parent->of_node;
> +		device_set_of_node_from_dev(dev, parent);
>
>  	rdescs = devm_kcalloc(dev, MAX77650_REGULATOR_NUM_REGULATORS,
>  			      sizeof(*rdescs), GFP_KERNEL);
> --
> 2.52.0
>
>

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>