[RESEND Patch 0/4] gpu: drm: not merged missing of_node_put fix

[RESEND Patch 0/4] gpu: drm: not merged missing of_node_put fix

[Peter Chen]

Hi Daniel,

Below are the remaining fixes for missing of_node_put, which are
not applied by you or individual driver maintainers.

Peter Chen (4):
  gpu: drm: omapdrm: connector-dvi: add missing of_node_put after
    calling of_parse_phandle
  gpu: drm: omapdrm: dss-of: add missing of_node_put after calling
    of_parse_phandle
  gpu: drm: exynos_hdmi: add missing of_node_put after calling
    of_parse_phandle
  gpu: drm: arcpgu_drv: add missing of_node_put after calling
    of_parse_phandle

 drivers/gpu/drm/arc/arcpgu_drv.c                 | 1 +
 drivers/gpu/drm/exynos/exynos_hdmi.c             | 2 ++
 drivers/gpu/drm/omapdrm/displays/connector-dvi.c | 1 +
 drivers/gpu/drm/omapdrm/dss/dss-of.c             | 7 ++++---
 4 files changed, 8 insertions(+), 3 deletions(-)

-- 
1.9.1

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[RESEND Patch 1/4] gpu: drm: omapdrm: connector-dvi: add missing of_node_put after calling of_parse_phandle

[Peter Chen]

of_node_put needs to be called when the device node which is got
from of_parse_phandle has finished using.

Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
---
 drivers/gpu/drm/omapdrm/displays/connector-dvi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/omapdrm/displays/connector-dvi.c b/drivers/gpu/drm/omapdrm/displays/connector-dvi.c
index 75f7827..684b7ae 100644
--- a/drivers/gpu/drm/omapdrm/displays/connector-dvi.c
+++ b/drivers/gpu/drm/omapdrm/displays/connector-dvi.c
@@ -255,6 +255,7 @@ static int dvic_probe_of(struct platform_device *pdev)
 	adapter_node = of_parse_phandle(node, "ddc-i2c-bus", 0);
 	if (adapter_node) {
 		adapter = of_get_i2c_adapter_by_node(adapter_node);
+		of_node_put(adapter_node);
 		if (adapter == NULL) {
 			dev_err(&pdev->dev, "failed to parse ddc-i2c-bus\n");
 			omap_dss_put_device(ddata->in);
-- 
1.9.1

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[RESEND Patch 2/4] gpu: drm: omapdrm: dss-of: add missing of_node_put after calling of_parse_phandle

[Peter Chen]

of_node_put needs to be called when the device node which is got
from of_parse_phandle has finished using.

Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
---
 drivers/gpu/drm/omapdrm/dss/dss-of.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/dss/dss-of.c b/drivers/gpu/drm/omapdrm/dss/dss-of.c
index dfd4e96..e256d87 100644
--- a/drivers/gpu/drm/omapdrm/dss/dss-of.c
+++ b/drivers/gpu/drm/omapdrm/dss/dss-of.c
@@ -125,15 +125,16 @@ u32 dss_of_port_get_port_number(struct device_node *port)
 
 static struct device_node *omapdss_of_get_remote_port(const struct device_node *node)
 {
-	struct device_node *np;
+	struct device_node *np, *np_parent;
 
 	np = of_parse_phandle(node, "remote-endpoint", 0);
 	if (!np)
 		return NULL;
 
-	np = of_get_next_parent(np);
+	np_parent = of_get_next_parent(np);
+	of_node_put(np);
 
-	return np;
+	return np_parent;
 }
 
 struct device_node *
-- 
1.9.1

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[RESEND Patch 3/4] gpu: drm: exynos_hdmi: add missing of_node_put after calling of_parse_phandle

[Peter Chen]

of_node_put needs to be called when the device node which is got
from of_parse_phandle has finished using.

Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
---
 drivers/gpu/drm/exynos/exynos_hdmi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 1625d7c..2275efe 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -1820,6 +1820,7 @@ static int hdmi_probe(struct platform_device *pdev)
 		DRM_ERROR("Failed to find ddc node in device tree\n");
 		return -ENODEV;
 	}
+	of_node_put(dev->of_node);
 
 out_get_ddc_adpt:
 	hdata->ddc_adpt = of_find_i2c_adapter_by_node(ddc_node);
@@ -1838,6 +1839,7 @@ out_get_ddc_adpt:
 		ret = -ENODEV;
 		goto err_ddc;
 	}
+	of_node_put(dev->of_node);
 
 out_get_phy_port:
 	if (hdata->drv_data->is_apb_phy) {
-- 
1.9.1

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[RESEND Patch 4/4] gpu: drm: arcpgu_drv: add missing of_node_put after calling of_parse_phandle

[Peter Chen]

of_node_put needs to be called when the device node which is got
from of_parse_phandle has finished using.

Cc: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
---
 drivers/gpu/drm/arc/arcpgu_drv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/arc/arcpgu_drv.c b/drivers/gpu/drm/arc/arcpgu_drv.c
index ccbdadb..0226ec0 100644
--- a/drivers/gpu/drm/arc/arcpgu_drv.c
+++ b/drivers/gpu/drm/arc/arcpgu_drv.c
@@ -127,6 +127,7 @@ static int arcpgu_load(struct drm_device *drm)
 	encoder_node = of_parse_phandle(drm->dev->of_node, "encoder-slave", 0);
 	if (encoder_node) {
 		ret = arcpgu_drm_hdmi_init(drm, encoder_node);
+		of_node_put(encoder_node);
 		if (ret < 0)
 			return ret;
 	} else {
-- 
1.9.1

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Re: [RESEND Patch 0/4] gpu: drm: not merged missing of_node_put fix

[Sean Paul]

On Thu, Jul 14, 2016 at 11:17 PM, Peter Chen <peter.chen@nxp.com> wrote:
> Hi Daniel,
>
> Below are the remaining fixes for missing of_node_put, which are
> not applied by you or individual driver maintainers.
>
> Peter Chen (4):
>   gpu: drm: omapdrm: connector-dvi: add missing of_node_put after
>     calling of_parse_phandle
>   gpu: drm: omapdrm: dss-of: add missing of_node_put after calling
>     of_parse_phandle
>   gpu: drm: exynos_hdmi: add missing of_node_put after calling
>     of_parse_phandle
>   gpu: drm: arcpgu_drv: add missing of_node_put after calling
>     of_parse_phandle
>
>  drivers/gpu/drm/arc/arcpgu_drv.c                 | 1 +
>  drivers/gpu/drm/exynos/exynos_hdmi.c             | 2 ++
>  drivers/gpu/drm/omapdrm/displays/connector-dvi.c | 1 +
>  drivers/gpu/drm/omapdrm/dss/dss-of.c             | 7 ++++---
>  4 files changed, 8 insertions(+), 3 deletions(-)


Applied to drm-misc.

>
> --
> 1.9.1
>
> _______________________________________________
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Re: [RESEND Patch 2/4] gpu: drm: omapdrm: dss-of: add missing of_node_put after calling of_parse_phandle

[Tomi Valkeinen]

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Hi,

On 15/07/16 06:17, Peter Chen wrote:
> of_node_put needs to be called when the device node which is got
> from of_parse_phandle has finished using.
> 
> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
> Signed-off-by: Peter Chen <peter.chen@nxp.com>
> ---
>  drivers/gpu/drm/omapdrm/dss/dss-of.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/omapdrm/dss/dss-of.c b/drivers/gpu/drm/omapdrm/dss/dss-of.c
> index dfd4e96..e256d87 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dss-of.c
> +++ b/drivers/gpu/drm/omapdrm/dss/dss-of.c
> @@ -125,15 +125,16 @@ u32 dss_of_port_get_port_number(struct device_node *port)
>  
>  static struct device_node *omapdss_of_get_remote_port(const struct device_node *node)
>  {
> -	struct device_node *np;
> +	struct device_node *np, *np_parent;
>  
>  	np = of_parse_phandle(node, "remote-endpoint", 0);
>  	if (!np)
>  		return NULL;
>  
> -	np = of_get_next_parent(np);
> +	np_parent = of_get_next_parent(np);
> +	of_node_put(np);
>  
> -	return np;
> +	return np_parent;
>  }

The doc for of_get_next_parent() says:

"This is like of_get_parent() except that it drops the
refcount on the passed node, making it suitable for iterating".

So this patch breaks omapdrm.

 Tomi


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RE: [RESEND Patch 2/4] gpu: drm: omapdrm: dss-of: add missing of_node_put after calling of_parse_phandle

[Peter Chen]

 
>On 15/07/16 06:17, Peter Chen wrote:
>> of_node_put needs to be called when the device node which is got from
>> of_parse_phandle has finished using.
>>
>> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
>> Signed-off-by: Peter Chen <peter.chen@nxp.com>
>> ---
>>  drivers/gpu/drm/omapdrm/dss/dss-of.c | 7 ++++---
>>  1 file changed, 4 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/omapdrm/dss/dss-of.c
>> b/drivers/gpu/drm/omapdrm/dss/dss-of.c
>> index dfd4e96..e256d87 100644
>> --- a/drivers/gpu/drm/omapdrm/dss/dss-of.c
>> +++ b/drivers/gpu/drm/omapdrm/dss/dss-of.c
>> @@ -125,15 +125,16 @@ u32 dss_of_port_get_port_number(struct
>> device_node *port)
>>
>>  static struct device_node *omapdss_of_get_remote_port(const struct
>> device_node *node)  {
>> -	struct device_node *np;
>> +	struct device_node *np, *np_parent;
>>
>>  	np = of_parse_phandle(node, "remote-endpoint", 0);
>>  	if (!np)
>>  		return NULL;
>>
>> -	np = of_get_next_parent(np);
>> +	np_parent = of_get_next_parent(np);
>> +	of_node_put(np);
>>
>> -	return np;
>> +	return np_parent;
>>  }
>
>The doc for of_get_next_parent() says:
>
>"This is like of_get_parent() except that it drops the refcount on the passed node,
>making it suitable for iterating".
>

It is my careless, thanks for pointing it.

Peter
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Re: [RESEND Patch 2/4] gpu: drm: omapdrm: dss-of: add missing of_node_put after calling of_parse_phandle

[Daniel Vetter]

On Thu, Aug 11, 2016 at 09:44:55AM +0000, Peter Chen wrote:
> 
>  
> >On 15/07/16 06:17, Peter Chen wrote:
> >> of_node_put needs to be called when the device node which is got from
> >> of_parse_phandle has finished using.
> >>
> >> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
> >> Signed-off-by: Peter Chen <peter.chen@nxp.com>
> >> ---
> >>  drivers/gpu/drm/omapdrm/dss/dss-of.c | 7 ++++---
> >>  1 file changed, 4 insertions(+), 3 deletions(-)
> >>
> >> diff --git a/drivers/gpu/drm/omapdrm/dss/dss-of.c
> >> b/drivers/gpu/drm/omapdrm/dss/dss-of.c
> >> index dfd4e96..e256d87 100644
> >> --- a/drivers/gpu/drm/omapdrm/dss/dss-of.c
> >> +++ b/drivers/gpu/drm/omapdrm/dss/dss-of.c
> >> @@ -125,15 +125,16 @@ u32 dss_of_port_get_port_number(struct
> >> device_node *port)
> >>
> >>  static struct device_node *omapdss_of_get_remote_port(const struct
> >> device_node *node)  {
> >> -	struct device_node *np;
> >> +	struct device_node *np, *np_parent;
> >>
> >>  	np = of_parse_phandle(node, "remote-endpoint", 0);
> >>  	if (!np)
> >>  		return NULL;
> >>
> >> -	np = of_get_next_parent(np);
> >> +	np_parent = of_get_next_parent(np);
> >> +	of_node_put(np);
> >>
> >> -	return np;
> >> +	return np_parent;
> >>  }
> >
> >The doc for of_get_next_parent() says:
> >
> >"This is like of_get_parent() except that it drops the refcount on the passed node,
> >making it suitable for iterating".
> >
> 
> It is my careless, thanks for pointing it.

Since it's already replied, should we just revert, or is a fixup patch
better?
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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